Home / 28,400.25-42,605.85-12,817.89

Finding the Fourth Proportional to 28,400.25, 42,605.85 and 12,817.89

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Solution

The fourth proportional to 28,400.25, 42,605.85 and 12,817.89 is: 19,229.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.25 : 42,605.85 = 12,817.89 : x
  2. Step 2: Convert to fraction form
    28,400.25/42,605.85 = 12,817.89/x
  3. Step 3: Cross multiply
    28,400.25x = 42,605.85 × 12,817.89
  4. Step 4: Simplify right side
    28,400.25x = 546,117,098.66
  5. Step 5: Solve for x
    x = 546,117,098.66/28,400.25
  6. Step 6: Final answer
    x = 19,229.31

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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.