Home / 20,631.44-28,472.64-11,679.32

Finding the Fourth Proportional to 20,631.44, 28,472.64 and 11,679.32

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Solution

The fourth proportional to 20,631.44, 28,472.64 and 11,679.32 is: 16,118.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.44 : 28,472.64 = 11,679.32 : x
  2. Step 2: Convert to fraction form
    20,631.44/28,472.64 = 11,679.32/x
  3. Step 3: Cross multiply
    20,631.44x = 28,472.64 × 11,679.32
  4. Step 4: Simplify right side
    20,631.44x = 332,541,073.80
  5. Step 5: Solve for x
    x = 332,541,073.80/20,631.44
  6. Step 6: Final answer
    x = 16,118.17

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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.