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Finding the Fourth Proportional to 13,752.52, 20,621.42 and 5,432.20

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Solution

The fourth proportional to 13,752.52, 20,621.42 and 5,432.20 is: 8,145.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.52 : 20,621.42 = 5,432.20 : x
  2. Step 2: Convert to fraction form
    13,752.52/20,621.42 = 5,432.20/x
  3. Step 3: Cross multiply
    13,752.52x = 20,621.42 × 5,432.20
  4. Step 4: Simplify right side
    13,752.52x = 112,019,677.72
  5. Step 5: Solve for x
    x = 112,019,677.72/13,752.52
  6. Step 6: Final answer
    x = 8,145.39

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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.