Home / 13,908.46-20,862.78-3,520.21

Finding the Fourth Proportional to 13,908.46, 20,862.78 and 3,520.21

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Solution

The fourth proportional to 13,908.46, 20,862.78 and 3,520.21 is: 5,280.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908.46 : 20,862.78 = 3,520.21 : x
  2. Step 2: Convert to fraction form
    13,908.46/20,862.78 = 3,520.21/x
  3. Step 3: Cross multiply
    13,908.46x = 20,862.78 × 3,520.21
  4. Step 4: Simplify right side
    13,908.46x = 73,441,366.78
  5. Step 5: Solve for x
    x = 73,441,366.78/13,908.46
  6. Step 6: Final answer
    x = 5,280.34

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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.