Home / 20,660.24-28,503.24-12,699.92

Finding the Fourth Proportional to 20,660.24, 28,503.24 and 12,699.92

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Solution

The fourth proportional to 20,660.24, 28,503.24 and 12,699.92 is: 17,521.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.24 : 28,503.24 = 12,699.92 : x
  2. Step 2: Convert to fraction form
    20,660.24/28,503.24 = 12,699.92/x
  3. Step 3: Cross multiply
    20,660.24x = 28,503.24 × 12,699.92
  4. Step 4: Simplify right side
    20,660.24x = 361,988,867.74
  5. Step 5: Solve for x
    x = 361,988,867.74/20,660.24
  6. Step 6: Final answer
    x = 17,521.04

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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.