Home / 8,138.31-12,209.28-3,458.47

Finding the Fourth Proportional to 8,138.31, 12,209.28 and 3,458.47

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Solution

The fourth proportional to 8,138.31, 12,209.28 and 3,458.47 is: 5,188.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.31 : 12,209.28 = 3,458.47 : x
  2. Step 2: Convert to fraction form
    8,138.31/12,209.28 = 3,458.47/x
  3. Step 3: Cross multiply
    8,138.31x = 12,209.28 × 3,458.47
  4. Step 4: Simplify right side
    8,138.31x = 42,225,363.23
  5. Step 5: Solve for x
    x = 42,225,363.23/8,138.31
  6. Step 6: Final answer
    x = 5,188.47

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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.