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Finding the Fourth Proportional to 10,257.80, 15,375.90 and 4,015.40

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Solution

The fourth proportional to 10,257.80, 15,375.90 and 4,015.40 is: 6,018.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,257.80 : 15,375.90 = 4,015.40 : x
  2. Step 2: Convert to fraction form
    10,257.80/15,375.90 = 4,015.40/x
  3. Step 3: Cross multiply
    10,257.80x = 15,375.90 × 4,015.40
  4. Step 4: Simplify right side
    10,257.80x = 61,740,388.86
  5. Step 5: Solve for x
    x = 61,740,388.86/10,257.80
  6. Step 6: Final answer
    x = 6,018.87

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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.