Home / 10,147.20-15,215.40-4,297.20

Finding the Fourth Proportional to 10,147.20, 15,215.40 and 4,297.20

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Solution

The fourth proportional to 10,147.20, 15,215.40 and 4,297.20 is: 6,443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,147.20 : 15,215.40 = 4,297.20 : x
  2. Step 2: Convert to fraction form
    10,147.20/15,215.40 = 4,297.20/x
  3. Step 3: Cross multiply
    10,147.20x = 15,215.40 × 4,297.20
  4. Step 4: Simplify right side
    10,147.20x = 65,383,616.88
  5. Step 5: Solve for x
    x = 65,383,616.88/10,147.20
  6. Step 6: Final answer
    x = 6,443.51

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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.