Home / 20,001.12-29,978.82-12,508.08

Finding the Fourth Proportional to 20,001.12, 29,978.82 and 12,508.08

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Solution

The fourth proportional to 20,001.12, 29,978.82 and 12,508.08 is: 18,747.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,001.12 : 29,978.82 = 12,508.08 : x
  2. Step 2: Convert to fraction form
    20,001.12/29,978.82 = 12,508.08/x
  3. Step 3: Cross multiply
    20,001.12x = 29,978.82 × 12,508.08
  4. Step 4: Simplify right side
    20,001.12x = 374,977,478.87
  5. Step 5: Solve for x
    x = 374,977,478.87/20,001.12
  6. Step 6: Final answer
    x = 18,747.82

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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.