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Finding the Fourth Proportional to 13,992.64, 19,309.82 and 7,705.02

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Solution

The fourth proportional to 13,992.64, 19,309.82 and 7,705.02 is: 10,632.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.64 : 19,309.82 = 7,705.02 : x
  2. Step 2: Convert to fraction form
    13,992.64/19,309.82 = 7,705.02/x
  3. Step 3: Cross multiply
    13,992.64x = 19,309.82 × 7,705.02
  4. Step 4: Simplify right side
    13,992.64x = 148,782,549.30
  5. Step 5: Solve for x
    x = 148,782,549.30/13,992.64
  6. Step 6: Final answer
    x = 10,632.91

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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.