Home / 13,587.79-20,380.32-3,728.06

Finding the Fourth Proportional to 13,587.79, 20,380.32 and 3,728.06

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Solution

The fourth proportional to 13,587.79, 20,380.32 and 3,728.06 is: 5,591.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,587.79 : 20,380.32 = 3,728.06 : x
  2. Step 2: Convert to fraction form
    13,587.79/20,380.32 = 3,728.06/x
  3. Step 3: Cross multiply
    13,587.79x = 20,380.32 × 3,728.06
  4. Step 4: Simplify right side
    13,587.79x = 75,979,055.78
  5. Step 5: Solve for x
    x = 75,979,055.78/13,587.79
  6. Step 6: Final answer
    x = 5,591.72

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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.