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Finding the Fourth Proportional to 25,811.55, 38,713.68 and 8,279.10

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Solution

The fourth proportional to 25,811.55, 38,713.68 and 8,279.10 is: 12,417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,811.55 : 38,713.68 = 8,279.10 : x
  2. Step 2: Convert to fraction form
    25,811.55/38,713.68 = 8,279.10/x
  3. Step 3: Cross multiply
    25,811.55x = 38,713.68 × 8,279.10
  4. Step 4: Simplify right side
    25,811.55x = 320,514,428.09
  5. Step 5: Solve for x
    x = 320,514,428.09/25,811.55
  6. Step 6: Final answer
    x = 12,417.48

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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.