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Finding the Fourth Proportional to 7,489.59, 10,260.72 and 7,209.19

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Solution

The fourth proportional to 7,489.59, 10,260.72 and 7,209.19 is: 9,876.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.59 : 10,260.72 = 7,209.19 : x
  2. Step 2: Convert to fraction form
    7,489.59/10,260.72 = 7,209.19/x
  3. Step 3: Cross multiply
    7,489.59x = 10,260.72 × 7,209.19
  4. Step 4: Simplify right side
    7,489.59x = 73,971,480.02
  5. Step 5: Solve for x
    x = 73,971,480.02/7,489.59
  6. Step 6: Final answer
    x = 9,876.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.