Home / 20,771.68-28,645.44-13,685.76

Finding the Fourth Proportional to 20,771.68, 28,645.44 and 13,685.76

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Solution

The fourth proportional to 20,771.68, 28,645.44 and 13,685.76 is: 18,873.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.68 : 28,645.44 = 13,685.76 : x
  2. Step 2: Convert to fraction form
    20,771.68/28,645.44 = 13,685.76/x
  3. Step 3: Cross multiply
    20,771.68x = 28,645.44 × 13,685.76
  4. Step 4: Simplify right side
    20,771.68x = 392,034,616.93
  5. Step 5: Solve for x
    x = 392,034,616.93/20,771.68
  6. Step 6: Final answer
    x = 18,873.52

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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.