Home / 20,456.20-28,222.14-13,382.20

Finding the Fourth Proportional to 20,456.20, 28,222.14 and 13,382.20

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Solution

The fourth proportional to 20,456.20, 28,222.14 and 13,382.20 is: 18,462.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.20 : 28,222.14 = 13,382.20 : x
  2. Step 2: Convert to fraction form
    20,456.20/28,222.14 = 13,382.20/x
  3. Step 3: Cross multiply
    20,456.20x = 28,222.14 × 13,382.20
  4. Step 4: Simplify right side
    20,456.20x = 377,674,321.91
  5. Step 5: Solve for x
    x = 377,674,321.91/20,456.20
  6. Step 6: Final answer
    x = 18,462.58

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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.