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Finding the Fourth Proportional to 18,281.20, 27,429.60 and 8,929.48

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Solution

The fourth proportional to 18,281.20, 27,429.60 and 8,929.48 is: 13,398.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,281.20 : 27,429.60 = 8,929.48 : x
  2. Step 2: Convert to fraction form
    18,281.20/27,429.60 = 8,929.48/x
  3. Step 3: Cross multiply
    18,281.20x = 27,429.60 × 8,929.48
  4. Step 4: Simplify right side
    18,281.20x = 244,932,064.61
  5. Step 5: Solve for x
    x = 244,932,064.61/18,281.20
  6. Step 6: Final answer
    x = 13,398.03

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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.