Home / 28,230.40-42,331.92-8,505.28

Finding the Fourth Proportional to 28,230.40, 42,331.92 and 8,505.28

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Solution

The fourth proportional to 28,230.40, 42,331.92 and 8,505.28 is: 12,753.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.40 : 42,331.92 = 8,505.28 : x
  2. Step 2: Convert to fraction form
    28,230.40/42,331.92 = 8,505.28/x
  3. Step 3: Cross multiply
    28,230.40x = 42,331.92 × 8,505.28
  4. Step 4: Simplify right side
    28,230.40x = 360,044,832.54
  5. Step 5: Solve for x
    x = 360,044,832.54/28,230.40
  6. Step 6: Final answer
    x = 12,753.80

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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.