Home / 13,990.41-20,972.42-6,963.78

Finding the Fourth Proportional to 13,990.41, 20,972.42 and 6,963.78

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Solution

The fourth proportional to 13,990.41, 20,972.42 and 6,963.78 is: 10,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.41 : 20,972.42 = 6,963.78 : x
  2. Step 2: Convert to fraction form
    13,990.41/20,972.42 = 6,963.78/x
  3. Step 3: Cross multiply
    13,990.41x = 20,972.42 × 6,963.78
  4. Step 4: Simplify right side
    13,990.41x = 146,047,284.13
  5. Step 5: Solve for x
    x = 146,047,284.13/13,990.41
  6. Step 6: Final answer
    x = 10,439.10

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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.