Home / 20,326.08-30,489.20-7,171.28

Finding the Fourth Proportional to 20,326.08, 30,489.20 and 7,171.28

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Solution

The fourth proportional to 20,326.08, 30,489.20 and 7,171.28 is: 10,756.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,326.08 : 30,489.20 = 7,171.28 : x
  2. Step 2: Convert to fraction form
    20,326.08/30,489.20 = 7,171.28/x
  3. Step 3: Cross multiply
    20,326.08x = 30,489.20 × 7,171.28
  4. Step 4: Simplify right side
    20,326.08x = 218,646,590.18
  5. Step 5: Solve for x
    x = 218,646,590.18/20,326.08
  6. Step 6: Final answer
    x = 10,756.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.