Home / 20,405.10-28,161.06-12,452.64

Finding the Fourth Proportional to 20,405.10, 28,161.06 and 12,452.64

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Solution

The fourth proportional to 20,405.10, 28,161.06 and 12,452.64 is: 17,185.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.10 : 28,161.06 = 12,452.64 : x
  2. Step 2: Convert to fraction form
    20,405.10/28,161.06 = 12,452.64/x
  3. Step 3: Cross multiply
    20,405.10x = 28,161.06 × 12,452.64
  4. Step 4: Simplify right side
    20,405.10x = 350,679,542.20
  5. Step 5: Solve for x
    x = 350,679,542.20/20,405.10
  6. Step 6: Final answer
    x = 17,185.88

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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.