Home / 10,515.13-15,767.19-3,118.57

Finding the Fourth Proportional to 10,515.13, 15,767.19 and 3,118.57

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Solution

The fourth proportional to 10,515.13, 15,767.19 and 3,118.57 is: 4,676.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.13 : 15,767.19 = 3,118.57 : x
  2. Step 2: Convert to fraction form
    10,515.13/15,767.19 = 3,118.57/x
  3. Step 3: Cross multiply
    10,515.13x = 15,767.19 × 3,118.57
  4. Step 4: Simplify right side
    10,515.13x = 49,171,085.72
  5. Step 5: Solve for x
    x = 49,171,085.72/10,515.13
  6. Step 6: Final answer
    x = 4,676.22

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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.