Home / 13,286.43-19,929.78-4,521.15

Finding the Fourth Proportional to 13,286.43, 19,929.78 and 4,521.15

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Solution

The fourth proportional to 13,286.43, 19,929.78 and 4,521.15 is: 6,781.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.43 : 19,929.78 = 4,521.15 : x
  2. Step 2: Convert to fraction form
    13,286.43/19,929.78 = 4,521.15/x
  3. Step 3: Cross multiply
    13,286.43x = 19,929.78 × 4,521.15
  4. Step 4: Simplify right side
    13,286.43x = 90,105,524.85
  5. Step 5: Solve for x
    x = 90,105,524.85/13,286.43
  6. Step 6: Final answer
    x = 6,781.77

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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.