Home / 7,687.31-11,531.16-2,140.63

Finding the Fourth Proportional to 7,687.31, 11,531.16 and 2,140.63

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Solution

The fourth proportional to 7,687.31, 11,531.16 and 2,140.63 is: 3,211.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.31 : 11,531.16 = 2,140.63 : x
  2. Step 2: Convert to fraction form
    7,687.31/11,531.16 = 2,140.63/x
  3. Step 3: Cross multiply
    7,687.31x = 11,531.16 × 2,140.63
  4. Step 4: Simplify right side
    7,687.31x = 24,683,918.20
  5. Step 5: Solve for x
    x = 24,683,918.20/7,687.31
  6. Step 6: Final answer
    x = 3,211.00

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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.