Home / 28,113.90-38,781.82-18,031.12

Finding the Fourth Proportional to 28,113.90, 38,781.82 and 18,031.12

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Solution

The fourth proportional to 28,113.90, 38,781.82 and 18,031.12 is: 24,873.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.90 : 38,781.82 = 18,031.12 : x
  2. Step 2: Convert to fraction form
    28,113.90/38,781.82 = 18,031.12/x
  3. Step 3: Cross multiply
    28,113.90x = 38,781.82 × 18,031.12
  4. Step 4: Simplify right side
    28,113.90x = 699,279,575.82
  5. Step 5: Solve for x
    x = 699,279,575.82/28,113.90
  6. Step 6: Final answer
    x = 24,873.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.