Home / 20,538.66-28,343.25-11,107.20

Finding the Fourth Proportional to 20,538.66, 28,343.25 and 11,107.20

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Solution

The fourth proportional to 20,538.66, 28,343.25 and 11,107.20 is: 15,327.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.66 : 28,343.25 = 11,107.20 : x
  2. Step 2: Convert to fraction form
    20,538.66/28,343.25 = 11,107.20/x
  3. Step 3: Cross multiply
    20,538.66x = 28,343.25 × 11,107.20
  4. Step 4: Simplify right side
    20,538.66x = 314,814,146.40
  5. Step 5: Solve for x
    x = 314,814,146.40/20,538.66
  6. Step 6: Final answer
    x = 15,327.88

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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.