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Finding the Fourth Proportional to 7,239.80, 10,859.70 and 5,125.70

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Solution

The fourth proportional to 7,239.80, 10,859.70 and 5,125.70 is: 7,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.80 : 10,859.70 = 5,125.70 : x
  2. Step 2: Convert to fraction form
    7,239.80/10,859.70 = 5,125.70/x
  3. Step 3: Cross multiply
    7,239.80x = 10,859.70 × 5,125.70
  4. Step 4: Simplify right side
    7,239.80x = 55,663,564.29
  5. Step 5: Solve for x
    x = 55,663,564.29/7,239.80
  6. Step 6: Final answer
    x = 7,688.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.