Home / 8,257.87-12,390.27-5,140.48

Finding the Fourth Proportional to 8,257.87, 12,390.27 and 5,140.48

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Solution

The fourth proportional to 8,257.87, 12,390.27 and 5,140.48 is: 7,712.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,257.87 : 12,390.27 = 5,140.48 : x
  2. Step 2: Convert to fraction form
    8,257.87/12,390.27 = 5,140.48/x
  3. Step 3: Cross multiply
    8,257.87x = 12,390.27 × 5,140.48
  4. Step 4: Simplify right side
    8,257.87x = 63,691,960.26
  5. Step 5: Solve for x
    x = 63,691,960.26/8,257.87
  6. Step 6: Final answer
    x = 7,712.88

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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.