Home / 13,712.12-20,571.90-4,478.12

Finding the Fourth Proportional to 13,712.12, 20,571.90 and 4,478.12

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Solution

The fourth proportional to 13,712.12, 20,571.90 and 4,478.12 is: 6,718.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.12 : 20,571.90 = 4,478.12 : x
  2. Step 2: Convert to fraction form
    13,712.12/20,571.90 = 4,478.12/x
  3. Step 3: Cross multiply
    13,712.12x = 20,571.90 × 4,478.12
  4. Step 4: Simplify right side
    13,712.12x = 92,123,436.83
  5. Step 5: Solve for x
    x = 92,123,436.83/13,712.12
  6. Step 6: Final answer
    x = 6,718.39

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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.