Home / 28,269.30-42,356.79-12,450.78

Finding the Fourth Proportional to 28,269.30, 42,356.79 and 12,450.78

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Solution

The fourth proportional to 28,269.30, 42,356.79 and 12,450.78 is: 18,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269.30 : 42,356.79 = 12,450.78 : x
  2. Step 2: Convert to fraction form
    28,269.30/42,356.79 = 12,450.78/x
  3. Step 3: Cross multiply
    28,269.30x = 42,356.79 × 12,450.78
  4. Step 4: Simplify right side
    28,269.30x = 527,375,073.80
  5. Step 5: Solve for x
    x = 527,375,073.80/28,269.30
  6. Step 6: Final answer
    x = 18,655.40

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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.