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Finding the Fourth Proportional to 27,885.74, 38,482.78 and 15,138.92

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Solution

The fourth proportional to 27,885.74, 38,482.78 and 15,138.92 is: 20,891.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,885.74 : 38,482.78 = 15,138.92 : x
  2. Step 2: Convert to fraction form
    27,885.74/38,482.78 = 15,138.92/x
  3. Step 3: Cross multiply
    27,885.74x = 38,482.78 × 15,138.92
  4. Step 4: Simplify right side
    27,885.74x = 582,587,842.93
  5. Step 5: Solve for x
    x = 582,587,842.93/27,885.74
  6. Step 6: Final answer
    x = 20,891.96

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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.