Home / 10,140.31-15,211.68-3,900.07

Finding the Fourth Proportional to 10,140.31, 15,211.68 and 3,900.07

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Solution

The fourth proportional to 10,140.31, 15,211.68 and 3,900.07 is: 5,850.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,140.31 : 15,211.68 = 3,900.07 : x
  2. Step 2: Convert to fraction form
    10,140.31/15,211.68 = 3,900.07/x
  3. Step 3: Cross multiply
    10,140.31x = 15,211.68 × 3,900.07
  4. Step 4: Simplify right side
    10,140.31x = 59,326,616.82
  5. Step 5: Solve for x
    x = 59,326,616.82/10,140.31
  6. Step 6: Final answer
    x = 5,850.57

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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.