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Finding the Fourth Proportional to 10,878.46, 15,008.65 and 7,520.06

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Solution

The fourth proportional to 10,878.46, 15,008.65 and 7,520.06 is: 10,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,878.46 : 15,008.65 = 7,520.06 : x
  2. Step 2: Convert to fraction form
    10,878.46/15,008.65 = 7,520.06/x
  3. Step 3: Cross multiply
    10,878.46x = 15,008.65 × 7,520.06
  4. Step 4: Simplify right side
    10,878.46x = 112,865,948.52
  5. Step 5: Solve for x
    x = 112,865,948.52/10,878.46
  6. Step 6: Final answer
    x = 10,375.18

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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.