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Finding the Fourth Proportional to 28,691.52, 43,014.08 and 12,287.04

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Solution

The fourth proportional to 28,691.52, 43,014.08 and 12,287.04 is: 18,420.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.52 : 43,014.08 = 12,287.04 : x
  2. Step 2: Convert to fraction form
    28,691.52/43,014.08 = 12,287.04/x
  3. Step 3: Cross multiply
    28,691.52x = 43,014.08 × 12,287.04
  4. Step 4: Simplify right side
    28,691.52x = 528,515,721.52
  5. Step 5: Solve for x
    x = 528,515,721.52/28,691.52
  6. Step 6: Final answer
    x = 18,420.62

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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.