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Finding the Fourth Proportional to 11,309.76, 16,881.21 and 9,980.28

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Solution

The fourth proportional to 11,309.76, 16,881.21 and 9,980.28 is: 14,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,309.76 : 16,881.21 = 9,980.28 : x
  2. Step 2: Convert to fraction form
    11,309.76/16,881.21 = 9,980.28/x
  3. Step 3: Cross multiply
    11,309.76x = 16,881.21 × 9,980.28
  4. Step 4: Simplify right side
    11,309.76x = 168,479,202.54
  5. Step 5: Solve for x
    x = 168,479,202.54/11,309.76
  6. Step 6: Final answer
    x = 14,896.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.