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Finding the Fourth Proportional to 27,874.40, 38,479.76 and 18,691.58

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Solution

The fourth proportional to 27,874.40, 38,479.76 and 18,691.58 is: 25,803.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,874.40 : 38,479.76 = 18,691.58 : x
  2. Step 2: Convert to fraction form
    27,874.40/38,479.76 = 18,691.58/x
  3. Step 3: Cross multiply
    27,874.40x = 38,479.76 × 18,691.58
  4. Step 4: Simplify right side
    27,874.40x = 719,247,585.26
  5. Step 5: Solve for x
    x = 719,247,585.26/27,874.40
  6. Step 6: Final answer
    x = 25,803.16

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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.