Home / 28,257.80-42,390.60-9,543.20

Finding the Fourth Proportional to 28,257.80, 42,390.60 and 9,543.20

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Solution

The fourth proportional to 28,257.80, 42,390.60 and 9,543.20 is: 14,316.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.80 : 42,390.60 = 9,543.20 : x
  2. Step 2: Convert to fraction form
    28,257.80/42,390.60 = 9,543.20/x
  3. Step 3: Cross multiply
    28,257.80x = 42,390.60 × 9,543.20
  4. Step 4: Simplify right side
    28,257.80x = 404,541,973.92
  5. Step 5: Solve for x
    x = 404,541,973.92/28,257.80
  6. Step 6: Final answer
    x = 14,316.12

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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.