Home / 20,711.59-28,583.15-12,218.69

Finding the Fourth Proportional to 20,711.59, 28,583.15 and 12,218.69

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Solution

The fourth proportional to 20,711.59, 28,583.15 and 12,218.69 is: 16,862.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.59 : 28,583.15 = 12,218.69 : x
  2. Step 2: Convert to fraction form
    20,711.59/28,583.15 = 12,218.69/x
  3. Step 3: Cross multiply
    20,711.59x = 28,583.15 × 12,218.69
  4. Step 4: Simplify right side
    20,711.59x = 349,248,659.44
  5. Step 5: Solve for x
    x = 349,248,659.44/20,711.59
  6. Step 6: Final answer
    x = 16,862.48

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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.