Home / 13,621.78-20,433.85-3,761.06

Finding the Fourth Proportional to 13,621.78, 20,433.85 and 3,761.06

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Solution

The fourth proportional to 13,621.78, 20,433.85 and 3,761.06 is: 5,641.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.78 : 20,433.85 = 3,761.06 : x
  2. Step 2: Convert to fraction form
    13,621.78/20,433.85 = 3,761.06/x
  3. Step 3: Cross multiply
    13,621.78x = 20,433.85 × 3,761.06
  4. Step 4: Simplify right side
    13,621.78x = 76,852,935.88
  5. Step 5: Solve for x
    x = 76,852,935.88/13,621.78
  6. Step 6: Final answer
    x = 5,641.92

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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.