Home / 20,964.15-28,931.18-11,404.73

Finding the Fourth Proportional to 20,964.15, 28,931.18 and 11,404.73

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Solution

The fourth proportional to 20,964.15, 28,931.18 and 11,404.73 is: 15,738.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.15 : 28,931.18 = 11,404.73 : x
  2. Step 2: Convert to fraction form
    20,964.15/28,931.18 = 11,404.73/x
  3. Step 3: Cross multiply
    20,964.15x = 28,931.18 × 11,404.73
  4. Step 4: Simplify right side
    20,964.15x = 329,952,311.79
  5. Step 5: Solve for x
    x = 329,952,311.79/20,964.15
  6. Step 6: Final answer
    x = 15,738.88

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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.