Home / 28,439.10-42,663.31-12,649.57

Finding the Fourth Proportional to 28,439.10, 42,663.31 and 12,649.57

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Solution

The fourth proportional to 28,439.10, 42,663.31 and 12,649.57 is: 18,976.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.10 : 42,663.31 = 12,649.57 : x
  2. Step 2: Convert to fraction form
    28,439.10/42,663.31 = 12,649.57/x
  3. Step 3: Cross multiply
    28,439.10x = 42,663.31 × 12,649.57
  4. Step 4: Simplify right side
    28,439.10x = 539,672,387.99
  5. Step 5: Solve for x
    x = 539,672,387.99/28,439.10
  6. Step 6: Final answer
    x = 18,976.42

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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.