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Finding the Fourth Proportional to 25,805.78, 38,699.38 and 8,934.21

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Solution

The fourth proportional to 25,805.78, 38,699.38 and 8,934.21 is: 13,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,805.78 : 38,699.38 = 8,934.21 : x
  2. Step 2: Convert to fraction form
    25,805.78/38,699.38 = 8,934.21/x
  3. Step 3: Cross multiply
    25,805.78x = 38,699.38 × 8,934.21
  4. Step 4: Simplify right side
    25,805.78x = 345,748,387.79
  5. Step 5: Solve for x
    x = 345,748,387.79/25,805.78
  6. Step 6: Final answer
    x = 13,398.10

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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.