Home / 28,229.52-42,360.69-12,647.15

Finding the Fourth Proportional to 28,229.52, 42,360.69 and 12,647.15

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Solution

The fourth proportional to 28,229.52, 42,360.69 and 12,647.15 is: 18,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.52 : 42,360.69 = 12,647.15 : x
  2. Step 2: Convert to fraction form
    28,229.52/42,360.69 = 12,647.15/x
  3. Step 3: Cross multiply
    28,229.52x = 42,360.69 × 12,647.15
  4. Step 4: Simplify right side
    28,229.52x = 535,741,769.16
  5. Step 5: Solve for x
    x = 535,741,769.16/28,229.52
  6. Step 6: Final answer
    x = 18,978.07

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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.