Home / 10,215.12-15,313.14-3,979.20

Finding the Fourth Proportional to 10,215.12, 15,313.14 and 3,979.20

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Solution

The fourth proportional to 10,215.12, 15,313.14 and 3,979.20 is: 5,965.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.12 : 15,313.14 = 3,979.20 : x
  2. Step 2: Convert to fraction form
    10,215.12/15,313.14 = 3,979.20/x
  3. Step 3: Cross multiply
    10,215.12x = 15,313.14 × 3,979.20
  4. Step 4: Simplify right side
    10,215.12x = 60,934,046.69
  5. Step 5: Solve for x
    x = 60,934,046.69/10,215.12
  6. Step 6: Final answer
    x = 5,965.08

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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.