Home / 20,668.96-28,488.46-15,822.04

Finding the Fourth Proportional to 20,668.96, 28,488.46 and 15,822.04

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Solution

The fourth proportional to 20,668.96, 28,488.46 and 15,822.04 is: 21,807.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.96 : 28,488.46 = 15,822.04 : x
  2. Step 2: Convert to fraction form
    20,668.96/28,488.46 = 15,822.04/x
  3. Step 3: Cross multiply
    20,668.96x = 28,488.46 × 15,822.04
  4. Step 4: Simplify right side
    20,668.96x = 450,745,553.66
  5. Step 5: Solve for x
    x = 450,745,553.66/20,668.96
  6. Step 6: Final answer
    x = 21,807.85

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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.