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Finding the Fourth Proportional to 28,691.91, 43,037.87 and 8,970.57

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Solution

The fourth proportional to 28,691.91, 43,037.87 and 8,970.57 is: 13,455.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.91 : 43,037.87 = 8,970.57 : x
  2. Step 2: Convert to fraction form
    28,691.91/43,037.87 = 8,970.57/x
  3. Step 3: Cross multiply
    28,691.91x = 43,037.87 × 8,970.57
  4. Step 4: Simplify right side
    28,691.91x = 386,074,180.63
  5. Step 5: Solve for x
    x = 386,074,180.63/28,691.91
  6. Step 6: Final answer
    x = 13,455.86

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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.