Home / 10,215.20-15,297.20-8,167.20

Finding the Fourth Proportional to 10,215.20, 15,297.20 and 8,167.20

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Solution

The fourth proportional to 10,215.20, 15,297.20 and 8,167.20 is: 12,230.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.20 : 15,297.20 = 8,167.20 : x
  2. Step 2: Convert to fraction form
    10,215.20/15,297.20 = 8,167.20/x
  3. Step 3: Cross multiply
    10,215.20x = 15,297.20 × 8,167.20
  4. Step 4: Simplify right side
    10,215.20x = 124,935,291.84
  5. Step 5: Solve for x
    x = 124,935,291.84/10,215.20
  6. Step 6: Final answer
    x = 12,230.33

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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.