Home / 13,912.76-20,870.36-6,119.75

Finding the Fourth Proportional to 13,912.76, 20,870.36 and 6,119.75

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Solution

The fourth proportional to 13,912.76, 20,870.36 and 6,119.75 is: 9,180.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.76 : 20,870.36 = 6,119.75 : x
  2. Step 2: Convert to fraction form
    13,912.76/20,870.36 = 6,119.75/x
  3. Step 3: Cross multiply
    13,912.76x = 20,870.36 × 6,119.75
  4. Step 4: Simplify right side
    13,912.76x = 127,721,385.61
  5. Step 5: Solve for x
    x = 127,721,385.61/13,912.76
  6. Step 6: Final answer
    x = 9,180.16

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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.