Home / 20,245.04-27,930.72-12,691.69

Finding the Fourth Proportional to 20,245.04, 27,930.72 and 12,691.69

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Solution

The fourth proportional to 20,245.04, 27,930.72 and 12,691.69 is: 17,509.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.04 : 27,930.72 = 12,691.69 : x
  2. Step 2: Convert to fraction form
    20,245.04/27,930.72 = 12,691.69/x
  3. Step 3: Cross multiply
    20,245.04x = 27,930.72 × 12,691.69
  4. Step 4: Simplify right side
    20,245.04x = 354,488,017.48
  5. Step 5: Solve for x
    x = 354,488,017.48/20,245.04
  6. Step 6: Final answer
    x = 17,509.87

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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.