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Finding the Fourth Proportional to 7,088.71, 9,781.81 and 3,945.19

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Solution

The fourth proportional to 7,088.71, 9,781.81 and 3,945.19 is: 5,444.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,088.71 : 9,781.81 = 3,945.19 : x
  2. Step 2: Convert to fraction form
    7,088.71/9,781.81 = 3,945.19/x
  3. Step 3: Cross multiply
    7,088.71x = 9,781.81 × 3,945.19
  4. Step 4: Simplify right side
    7,088.71x = 38,591,098.99
  5. Step 5: Solve for x
    x = 38,591,098.99/7,088.71
  6. Step 6: Final answer
    x = 5,444.02

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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.