Home / 20,666.16-28,519.56-11,234.88

Finding the Fourth Proportional to 20,666.16, 28,519.56 and 11,234.88

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Solution

The fourth proportional to 20,666.16, 28,519.56 and 11,234.88 is: 15,504.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.16 : 28,519.56 = 11,234.88 : x
  2. Step 2: Convert to fraction form
    20,666.16/28,519.56 = 11,234.88/x
  3. Step 3: Cross multiply
    20,666.16x = 28,519.56 × 11,234.88
  4. Step 4: Simplify right side
    20,666.16x = 320,413,834.25
  5. Step 5: Solve for x
    x = 320,413,834.25/20,666.16
  6. Step 6: Final answer
    x = 15,504.28

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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.