Home / 13,613.32-20,410.38-5,286.40

Finding the Fourth Proportional to 13,613.32, 20,410.38 and 5,286.40

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Solution

The fourth proportional to 13,613.32, 20,410.38 and 5,286.40 is: 7,925.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.32 : 20,410.38 = 5,286.40 : x
  2. Step 2: Convert to fraction form
    13,613.32/20,410.38 = 5,286.40/x
  3. Step 3: Cross multiply
    13,613.32x = 20,410.38 × 5,286.40
  4. Step 4: Simplify right side
    13,613.32x = 107,897,432.83
  5. Step 5: Solve for x
    x = 107,897,432.83/13,613.32
  6. Step 6: Final answer
    x = 7,925.87

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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.