Home / 8,687.31-13,030.79-2,113.53

Finding the Fourth Proportional to 8,687.31, 13,030.79 and 2,113.53

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Solution

The fourth proportional to 8,687.31, 13,030.79 and 2,113.53 is: 3,170.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.31 : 13,030.79 = 2,113.53 : x
  2. Step 2: Convert to fraction form
    8,687.31/13,030.79 = 2,113.53/x
  3. Step 3: Cross multiply
    8,687.31x = 13,030.79 × 2,113.53
  4. Step 4: Simplify right side
    8,687.31x = 27,540,955.02
  5. Step 5: Solve for x
    x = 27,540,955.02/8,687.31
  6. Step 6: Final answer
    x = 3,170.25

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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.