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Finding the Fourth Proportional to 38,854.40, 58,310.40 and 28,486.40

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Solution

The fourth proportional to 38,854.40, 58,310.40 and 28,486.40 is: 42,750.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,854.40 : 58,310.40 = 28,486.40 : x
  2. Step 2: Convert to fraction form
    38,854.40/58,310.40 = 28,486.40/x
  3. Step 3: Cross multiply
    38,854.40x = 58,310.40 × 28,486.40
  4. Step 4: Simplify right side
    38,854.40x = 1,661,053,378.56
  5. Step 5: Solve for x
    x = 1,661,053,378.56/38,854.40
  6. Step 6: Final answer
    x = 42,750.71

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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.