Home / 20,102.40-30,162.72-8,418.24

Finding the Fourth Proportional to 20,102.40, 30,162.72 and 8,418.24

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Solution

The fourth proportional to 20,102.40, 30,162.72 and 8,418.24 is: 12,631.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.40 : 30,162.72 = 8,418.24 : x
  2. Step 2: Convert to fraction form
    20,102.40/30,162.72 = 8,418.24/x
  3. Step 3: Cross multiply
    20,102.40x = 30,162.72 × 8,418.24
  4. Step 4: Simplify right side
    20,102.40x = 253,917,016.01
  5. Step 5: Solve for x
    x = 253,917,016.01/20,102.40
  6. Step 6: Final answer
    x = 12,631.18

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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.