Home / 28,637.65-42,939.15-12,839.75

Finding the Fourth Proportional to 28,637.65, 42,939.15 and 12,839.75

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Solution

The fourth proportional to 28,637.65, 42,939.15 and 12,839.75 is: 19,251.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.65 : 42,939.15 = 12,839.75 : x
  2. Step 2: Convert to fraction form
    28,637.65/42,939.15 = 12,839.75/x
  3. Step 3: Cross multiply
    28,637.65x = 42,939.15 × 12,839.75
  4. Step 4: Simplify right side
    28,637.65x = 551,327,849.39
  5. Step 5: Solve for x
    x = 551,327,849.39/28,637.65
  6. Step 6: Final answer
    x = 19,251.85

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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.