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Finding the Fourth Proportional to 7,715.55, 10,664.96 and 7,103.19

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Solution

The fourth proportional to 7,715.55, 10,664.96 and 7,103.19 is: 9,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.55 : 10,664.96 = 7,103.19 : x
  2. Step 2: Convert to fraction form
    7,715.55/10,664.96 = 7,103.19/x
  3. Step 3: Cross multiply
    7,715.55x = 10,664.96 × 7,103.19
  4. Step 4: Simplify right side
    7,715.55x = 75,755,201.71
  5. Step 5: Solve for x
    x = 75,755,201.71/7,715.55
  6. Step 6: Final answer
    x = 9,818.51

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Half scale
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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.