Home / 28,539.72-42,874.38-20,666.52

Finding the Fourth Proportional to 28,539.72, 42,874.38 and 20,666.52

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Solution

The fourth proportional to 28,539.72, 42,874.38 and 20,666.52 is: 31,046.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.72 : 42,874.38 = 20,666.52 : x
  2. Step 2: Convert to fraction form
    28,539.72/42,874.38 = 20,666.52/x
  3. Step 3: Cross multiply
    28,539.72x = 42,874.38 × 20,666.52
  4. Step 4: Simplify right side
    28,539.72x = 886,064,231.76
  5. Step 5: Solve for x
    x = 886,064,231.76/28,539.72
  6. Step 6: Final answer
    x = 31,046.70

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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.