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Finding the Fourth Proportional to 28,691.88, 43,039.10 and 8,970.84

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Solution

The fourth proportional to 28,691.88, 43,039.10 and 8,970.84 is: 13,456.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.88 : 43,039.10 = 8,970.84 : x
  2. Step 2: Convert to fraction form
    28,691.88/43,039.10 = 8,970.84/x
  3. Step 3: Cross multiply
    28,691.88x = 43,039.10 × 8,970.84
  4. Step 4: Simplify right side
    28,691.88x = 386,096,879.84
  5. Step 5: Solve for x
    x = 386,096,879.84/28,691.88
  6. Step 6: Final answer
    x = 13,456.66

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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.