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Finding the Fourth Proportional to 13,992.76, 19,310.14 and 7,705.28

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Solution

The fourth proportional to 13,992.76, 19,310.14 and 7,705.28 is: 10,633.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.76 : 19,310.14 = 7,705.28 : x
  2. Step 2: Convert to fraction form
    13,992.76/19,310.14 = 7,705.28/x
  3. Step 3: Cross multiply
    13,992.76x = 19,310.14 × 7,705.28
  4. Step 4: Simplify right side
    13,992.76x = 148,790,035.54
  5. Step 5: Solve for x
    x = 148,790,035.54/13,992.76
  6. Step 6: Final answer
    x = 10,633.36

Related Problems

Find fourth proportional to 6,996.38, 9,655.07 and 3,852.64
Half scale
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Double scale
Find fourth proportional to 13,993.76, 19,311.52 and 7,706.28
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.