Home / 20,530.01-28,331.83-11,575.78

Finding the Fourth Proportional to 20,530.01, 28,331.83 and 11,575.78

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Solution

The fourth proportional to 20,530.01, 28,331.83 and 11,575.78 is: 15,974.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.01 : 28,331.83 = 11,575.78 : x
  2. Step 2: Convert to fraction form
    20,530.01/28,331.83 = 11,575.78/x
  3. Step 3: Cross multiply
    20,530.01x = 28,331.83 × 11,575.78
  4. Step 4: Simplify right side
    20,530.01x = 327,963,031.08
  5. Step 5: Solve for x
    x = 327,963,031.08/20,530.01
  6. Step 6: Final answer
    x = 15,974.81

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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.