Home / 12,438.20-17,147.84-8,452.40

Finding the Fourth Proportional to 12,438.20, 17,147.84 and 8,452.40

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Solution

The fourth proportional to 12,438.20, 17,147.84 and 8,452.40 is: 11,652.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.20 : 17,147.84 = 8,452.40 : x
  2. Step 2: Convert to fraction form
    12,438.20/17,147.84 = 8,452.40/x
  3. Step 3: Cross multiply
    12,438.20x = 17,147.84 × 8,452.40
  4. Step 4: Simplify right side
    12,438.20x = 144,940,274.81
  5. Step 5: Solve for x
    x = 144,940,274.81/12,438.20
  6. Step 6: Final answer
    x = 11,652.83

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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.