Home / 20,618.54-28,453.46-11,186.90

Finding the Fourth Proportional to 20,618.54, 28,453.46 and 11,186.90

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Solution

The fourth proportional to 20,618.54, 28,453.46 and 11,186.90 is: 15,437.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.54 : 28,453.46 = 11,186.90 : x
  2. Step 2: Convert to fraction form
    20,618.54/28,453.46 = 11,186.90/x
  3. Step 3: Cross multiply
    20,618.54x = 28,453.46 × 11,186.90
  4. Step 4: Simplify right side
    20,618.54x = 318,306,011.67
  5. Step 5: Solve for x
    x = 318,306,011.67/20,618.54
  6. Step 6: Final answer
    x = 15,437.85

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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.