Home / 20,631.67-28,471.14-11,679.55

Finding the Fourth Proportional to 20,631.67, 28,471.14 and 11,679.55

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Solution

The fourth proportional to 20,631.67, 28,471.14 and 11,679.55 is: 16,117.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.67 : 28,471.14 = 11,679.55 : x
  2. Step 2: Convert to fraction form
    20,631.67/28,471.14 = 11,679.55/x
  3. Step 3: Cross multiply
    20,631.67x = 28,471.14 × 11,679.55
  4. Step 4: Simplify right side
    20,631.67x = 332,530,103.19
  5. Step 5: Solve for x
    x = 332,530,103.19/20,631.67
  6. Step 6: Final answer
    x = 16,117.46

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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.