Home / 20,511.65-28,306.67-11,558.66

Finding the Fourth Proportional to 20,511.65, 28,306.67 and 11,558.66

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Solution

The fourth proportional to 20,511.65, 28,306.67 and 11,558.66 is: 15,951.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.65 : 28,306.67 = 11,558.66 : x
  2. Step 2: Convert to fraction form
    20,511.65/28,306.67 = 11,558.66/x
  3. Step 3: Cross multiply
    20,511.65x = 28,306.67 × 11,558.66
  4. Step 4: Simplify right side
    20,511.65x = 327,187,174.26
  5. Step 5: Solve for x
    x = 327,187,174.26/20,511.65
  6. Step 6: Final answer
    x = 15,951.28

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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.