Home / 21,568.72-29,763.12-12,138.88

Finding the Fourth Proportional to 21,568.72, 29,763.12 and 12,138.88

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Solution

The fourth proportional to 21,568.72, 29,763.12 and 12,138.88 is: 16,750.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,568.72 : 29,763.12 = 12,138.88 : x
  2. Step 2: Convert to fraction form
    21,568.72/29,763.12 = 12,138.88/x
  3. Step 3: Cross multiply
    21,568.72x = 29,763.12 × 12,138.88
  4. Step 4: Simplify right side
    21,568.72x = 361,290,942.11
  5. Step 5: Solve for x
    x = 361,290,942.11/21,568.72
  6. Step 6: Final answer
    x = 16,750.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.