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Finding the Fourth Proportional to 55,992.47, 83,987.68 and 13,872.65

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Solution

The fourth proportional to 55,992.47, 83,987.68 and 13,872.65 is: 20,808.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,992.47 : 83,987.68 = 13,872.65 : x
  2. Step 2: Convert to fraction form
    55,992.47/83,987.68 = 13,872.65/x
  3. Step 3: Cross multiply
    55,992.47x = 83,987.68 × 13,872.65
  4. Step 4: Simplify right side
    55,992.47x = 1,165,131,688.95
  5. Step 5: Solve for x
    x = 1,165,131,688.95/55,992.47
  6. Step 6: Final answer
    x = 20,808.72

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1.5x scale

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.