Home / 13,960.60-20,912.55-8,679.40

Finding the Fourth Proportional to 13,960.60, 20,912.55 and 8,679.40

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Solution

The fourth proportional to 13,960.60, 20,912.55 and 8,679.40 is: 13,001.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,960.60 : 20,912.55 = 8,679.40 : x
  2. Step 2: Convert to fraction form
    13,960.60/20,912.55 = 8,679.40/x
  3. Step 3: Cross multiply
    13,960.60x = 20,912.55 × 8,679.40
  4. Step 4: Simplify right side
    13,960.60x = 181,508,386.47
  5. Step 5: Solve for x
    x = 181,508,386.47/13,960.60
  6. Step 6: Final answer
    x = 13,001.47

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1.5x scale

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.