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Finding the Fourth Proportional to 18,891.61, 28,337.31 and 9,028.44

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Solution

The fourth proportional to 18,891.61, 28,337.31 and 9,028.44 is: 13,542.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.61 : 28,337.31 = 9,028.44 : x
  2. Step 2: Convert to fraction form
    18,891.61/28,337.31 = 9,028.44/x
  3. Step 3: Cross multiply
    18,891.61x = 28,337.31 × 9,028.44
  4. Step 4: Simplify right side
    18,891.61x = 255,841,703.10
  5. Step 5: Solve for x
    x = 255,841,703.10/18,891.61
  6. Step 6: Final answer
    x = 13,542.61

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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.