Home / 20,375.08-28,117.60-11,422.56

Finding the Fourth Proportional to 20,375.08, 28,117.60 and 11,422.56

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Solution

The fourth proportional to 20,375.08, 28,117.60 and 11,422.56 is: 15,763.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.08 : 28,117.60 = 11,422.56 : x
  2. Step 2: Convert to fraction form
    20,375.08/28,117.60 = 11,422.56/x
  3. Step 3: Cross multiply
    20,375.08x = 28,117.60 × 11,422.56
  4. Step 4: Simplify right side
    20,375.08x = 321,174,973.06
  5. Step 5: Solve for x
    x = 321,174,973.06/20,375.08
  6. Step 6: Final answer
    x = 15,763.13

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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.