Home / 13,621.92-20,471.76-6,701.28

Finding the Fourth Proportional to 13,621.92, 20,471.76 and 6,701.28

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Solution

The fourth proportional to 13,621.92, 20,471.76 and 6,701.28 is: 10,071.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.92 : 20,471.76 = 6,701.28 : x
  2. Step 2: Convert to fraction form
    13,621.92/20,471.76 = 6,701.28/x
  3. Step 3: Cross multiply
    13,621.92x = 20,471.76 × 6,701.28
  4. Step 4: Simplify right side
    13,621.92x = 137,186,995.85
  5. Step 5: Solve for x
    x = 137,186,995.85/13,621.92
  6. Step 6: Final answer
    x = 10,071.05

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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.