Home / 20,662.40-28,513.76-11,230.88

Finding the Fourth Proportional to 20,662.40, 28,513.76 and 11,230.88

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Solution

The fourth proportional to 20,662.40, 28,513.76 and 11,230.88 is: 15,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.40 : 28,513.76 = 11,230.88 : x
  2. Step 2: Convert to fraction form
    20,662.40/28,513.76 = 11,230.88/x
  3. Step 3: Cross multiply
    20,662.40x = 28,513.76 × 11,230.88
  4. Step 4: Simplify right side
    20,662.40x = 320,234,616.91
  5. Step 5: Solve for x
    x = 320,234,616.91/20,662.40
  6. Step 6: Final answer
    x = 15,498.42

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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.