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Finding the Fourth Proportional to 7,490.98, 10,381.25 and 7,385.28

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Solution

The fourth proportional to 7,490.98, 10,381.25 and 7,385.28 is: 10,234.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,490.98 : 10,381.25 = 7,385.28 : x
  2. Step 2: Convert to fraction form
    7,490.98/10,381.25 = 7,385.28/x
  3. Step 3: Cross multiply
    7,490.98x = 10,381.25 × 7,385.28
  4. Step 4: Simplify right side
    7,490.98x = 76,668,417.53
  5. Step 5: Solve for x
    x = 76,668,417.53/7,490.98
  6. Step 6: Final answer
    x = 10,234.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.