Home / 42,229.28-63,336.62-12,639.18

Finding the Fourth Proportional to 42,229.28, 63,336.62 and 12,639.18

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Solution

The fourth proportional to 42,229.28, 63,336.62 and 12,639.18 is: 18,956.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,229.28 : 63,336.62 = 12,639.18 : x
  2. Step 2: Convert to fraction form
    42,229.28/63,336.62 = 12,639.18/x
  3. Step 3: Cross multiply
    42,229.28x = 63,336.62 × 12,639.18
  4. Step 4: Simplify right side
    42,229.28x = 800,522,940.77
  5. Step 5: Solve for x
    x = 800,522,940.77/42,229.28
  6. Step 6: Final answer
    x = 18,956.59

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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.