Home / 20,766.76-28,658.01-11,335.39

Finding the Fourth Proportional to 20,766.76, 28,658.01 and 11,335.39

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Solution

The fourth proportional to 20,766.76, 28,658.01 and 11,335.39 is: 15,642.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.76 : 28,658.01 = 11,335.39 : x
  2. Step 2: Convert to fraction form
    20,766.76/28,658.01 = 11,335.39/x
  3. Step 3: Cross multiply
    20,766.76x = 28,658.01 × 11,335.39
  4. Step 4: Simplify right side
    20,766.76x = 324,849,719.97
  5. Step 5: Solve for x
    x = 324,849,719.97/20,766.76
  6. Step 6: Final answer
    x = 15,642.77

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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.