Home / 10,061.82-15,085.85-5,121.90

Finding the Fourth Proportional to 10,061.82, 15,085.85 and 5,121.90

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Solution

The fourth proportional to 10,061.82, 15,085.85 and 5,121.90 is: 7,679.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,061.82 : 15,085.85 = 5,121.90 : x
  2. Step 2: Convert to fraction form
    10,061.82/15,085.85 = 5,121.90/x
  3. Step 3: Cross multiply
    10,061.82x = 15,085.85 × 5,121.90
  4. Step 4: Simplify right side
    10,061.82x = 77,268,189.51
  5. Step 5: Solve for x
    x = 77,268,189.51/10,061.82
  6. Step 6: Final answer
    x = 7,679.35

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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.