Home / 10,085.11-15,129.72-3,511.81

Finding the Fourth Proportional to 10,085.11, 15,129.72 and 3,511.81

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Solution

The fourth proportional to 10,085.11, 15,129.72 and 3,511.81 is: 5,268.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.11 : 15,129.72 = 3,511.81 : x
  2. Step 2: Convert to fraction form
    10,085.11/15,129.72 = 3,511.81/x
  3. Step 3: Cross multiply
    10,085.11x = 15,129.72 × 3,511.81
  4. Step 4: Simplify right side
    10,085.11x = 53,132,693.21
  5. Step 5: Solve for x
    x = 53,132,693.21/10,085.11
  6. Step 6: Final answer
    x = 5,268.43

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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.