Home / 20,500.32-28,291.68-13,682.66

Finding the Fourth Proportional to 20,500.32, 28,291.68 and 13,682.66

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Solution

The fourth proportional to 20,500.32, 28,291.68 and 13,682.66 is: 18,882.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.32 : 28,291.68 = 13,682.66 : x
  2. Step 2: Convert to fraction form
    20,500.32/28,291.68 = 13,682.66/x
  3. Step 3: Cross multiply
    20,500.32x = 28,291.68 × 13,682.66
  4. Step 4: Simplify right side
    20,500.32x = 387,105,296.81
  5. Step 5: Solve for x
    x = 387,105,296.81/20,500.32
  6. Step 6: Final answer
    x = 18,882.89

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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.