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Finding the Fourth Proportional to 9,966.71, 13,755.14 and 5,490.92

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Solution

The fourth proportional to 9,966.71, 13,755.14 and 5,490.92 is: 7,578.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,966.71 : 13,755.14 = 5,490.92 : x
  2. Step 2: Convert to fraction form
    9,966.71/13,755.14 = 5,490.92/x
  3. Step 3: Cross multiply
    9,966.71x = 13,755.14 × 5,490.92
  4. Step 4: Simplify right side
    9,966.71x = 75,528,373.33
  5. Step 5: Solve for x
    x = 75,528,373.33/9,966.71
  6. Step 6: Final answer
    x = 7,578.06

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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.