Home / 20,221.61-30,342.03-9,131.69

Finding the Fourth Proportional to 20,221.61, 30,342.03 and 9,131.69

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Solution

The fourth proportional to 20,221.61, 30,342.03 and 9,131.69 is: 13,701.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.61 : 30,342.03 = 9,131.69 : x
  2. Step 2: Convert to fraction form
    20,221.61/30,342.03 = 9,131.69/x
  3. Step 3: Cross multiply
    20,221.61x = 30,342.03 × 9,131.69
  4. Step 4: Simplify right side
    20,221.61x = 277,074,011.93
  5. Step 5: Solve for x
    x = 277,074,011.93/20,221.61
  6. Step 6: Final answer
    x = 13,701.88

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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.