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Finding the Fourth Proportional to 10,407.78, 15,616.20 and 5,476.20

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Solution

The fourth proportional to 10,407.78, 15,616.20 and 5,476.20 is: 8,216.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,407.78 : 15,616.20 = 5,476.20 : x
  2. Step 2: Convert to fraction form
    10,407.78/15,616.20 = 5,476.20/x
  3. Step 3: Cross multiply
    10,407.78x = 15,616.20 × 5,476.20
  4. Step 4: Simplify right side
    10,407.78x = 85,517,434.44
  5. Step 5: Solve for x
    x = 85,517,434.44/10,407.78
  6. Step 6: Final answer
    x = 8,216.68

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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.