Home / 47,490.12-71,235.18-12,432.78

Finding the Fourth Proportional to 47,490.12, 71,235.18 and 12,432.78

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Solution

The fourth proportional to 47,490.12, 71,235.18 and 12,432.78 is: 18,649.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,490.12 : 71,235.18 = 12,432.78 : x
  2. Step 2: Convert to fraction form
    47,490.12/71,235.18 = 12,432.78/x
  3. Step 3: Cross multiply
    47,490.12x = 71,235.18 × 12,432.78
  4. Step 4: Simplify right side
    47,490.12x = 885,651,321.20
  5. Step 5: Solve for x
    x = 885,651,321.20/47,490.12
  6. Step 6: Final answer
    x = 18,649.17

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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.