Home / 10,215.19-15,327.09-3,979.61

Finding the Fourth Proportional to 10,215.19, 15,327.09 and 3,979.61

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Solution

The fourth proportional to 10,215.19, 15,327.09 and 3,979.61 is: 5,971.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.19 : 15,327.09 = 3,979.61 : x
  2. Step 2: Convert to fraction form
    10,215.19/15,327.09 = 3,979.61/x
  3. Step 3: Cross multiply
    10,215.19x = 15,327.09 × 3,979.61
  4. Step 4: Simplify right side
    10,215.19x = 60,995,840.63
  5. Step 5: Solve for x
    x = 60,995,840.63/10,215.19
  6. Step 6: Final answer
    x = 5,971.09

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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.