Home / 20,658.57-28,508.67-11,227.20

Finding the Fourth Proportional to 20,658.57, 28,508.67 and 11,227.20

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Solution

The fourth proportional to 20,658.57, 28,508.67 and 11,227.20 is: 15,493.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.57 : 28,508.67 = 11,227.20 : x
  2. Step 2: Convert to fraction form
    20,658.57/28,508.67 = 11,227.20/x
  3. Step 3: Cross multiply
    20,658.57x = 28,508.67 × 11,227.20
  4. Step 4: Simplify right side
    20,658.57x = 320,072,539.82
  5. Step 5: Solve for x
    x = 320,072,539.82/20,658.57
  6. Step 6: Final answer
    x = 15,493.45

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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.