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Finding the Fourth Proportional to 7,490.86, 10,381.07 and 7,385.15

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Solution

The fourth proportional to 7,490.86, 10,381.07 and 7,385.15 is: 10,234.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,490.86 : 10,381.07 = 7,385.15 : x
  2. Step 2: Convert to fraction form
    7,490.86/10,381.07 = 7,385.15/x
  3. Step 3: Cross multiply
    7,490.86x = 10,381.07 × 7,385.15
  4. Step 4: Simplify right side
    7,490.86x = 76,665,759.11
  5. Step 5: Solve for x
    x = 76,665,759.11/7,490.86
  6. Step 6: Final answer
    x = 10,234.57

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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.