Home / 20,429.12-28,193.19-11,479.43

Finding the Fourth Proportional to 20,429.12, 28,193.19 and 11,479.43

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Solution

The fourth proportional to 20,429.12, 28,193.19 and 11,479.43 is: 15,842.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.12 : 28,193.19 = 11,479.43 : x
  2. Step 2: Convert to fraction form
    20,429.12/28,193.19 = 11,479.43/x
  3. Step 3: Cross multiply
    20,429.12x = 28,193.19 × 11,479.43
  4. Step 4: Simplify right side
    20,429.12x = 323,641,821.56
  5. Step 5: Solve for x
    x = 323,641,821.56/20,429.12
  6. Step 6: Final answer
    x = 15,842.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.