Home / 13,839.76-20,759.42-6,440.08

Finding the Fourth Proportional to 13,839.76, 20,759.42 and 6,440.08

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Solution

The fourth proportional to 13,839.76, 20,759.42 and 6,440.08 is: 9,660.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.76 : 20,759.42 = 6,440.08 : x
  2. Step 2: Convert to fraction form
    13,839.76/20,759.42 = 6,440.08/x
  3. Step 3: Cross multiply
    13,839.76x = 20,759.42 × 6,440.08
  4. Step 4: Simplify right side
    13,839.76x = 133,692,325.55
  5. Step 5: Solve for x
    x = 133,692,325.55/13,839.76
  6. Step 6: Final answer
    x = 9,660.02

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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.