Home / 28,618.29-39,473.45-20,138.20

Finding the Fourth Proportional to 28,618.29, 39,473.45 and 20,138.20

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Solution

The fourth proportional to 28,618.29, 39,473.45 and 20,138.20 is: 27,776.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.29 : 39,473.45 = 20,138.20 : x
  2. Step 2: Convert to fraction form
    28,618.29/39,473.45 = 20,138.20/x
  3. Step 3: Cross multiply
    28,618.29x = 39,473.45 × 20,138.20
  4. Step 4: Simplify right side
    28,618.29x = 794,924,230.79
  5. Step 5: Solve for x
    x = 794,924,230.79/28,618.29
  6. Step 6: Final answer
    x = 27,776.79

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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.