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Finding the Fourth Proportional to 10,411.20, 15,616.80 and 3,015.90

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Solution

The fourth proportional to 10,411.20, 15,616.80 and 3,015.90 is: 4,523.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,411.20 : 15,616.80 = 3,015.90 : x
  2. Step 2: Convert to fraction form
    10,411.20/15,616.80 = 3,015.90/x
  3. Step 3: Cross multiply
    10,411.20x = 15,616.80 × 3,015.90
  4. Step 4: Simplify right side
    10,411.20x = 47,098,707.12
  5. Step 5: Solve for x
    x = 47,098,707.12/10,411.20
  6. Step 6: Final answer
    x = 4,523.85

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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.