Home / 28,216.80-38,930.76-16,279.92

Finding the Fourth Proportional to 28,216.80, 38,930.76 and 16,279.92

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Solution

The fourth proportional to 28,216.80, 38,930.76 and 16,279.92 is: 22,461.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,216.80 : 38,930.76 = 16,279.92 : x
  2. Step 2: Convert to fraction form
    28,216.80/38,930.76 = 16,279.92/x
  3. Step 3: Cross multiply
    28,216.80x = 38,930.76 × 16,279.92
  4. Step 4: Simplify right side
    28,216.80x = 633,789,658.34
  5. Step 5: Solve for x
    x = 633,789,658.34/28,216.80
  6. Step 6: Final answer
    x = 22,461.43

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Half scale
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Double scale
Find fourth proportional to 28,217.80, 38,932.14 and 16,280.92
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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.