Home / 15,851.20-21,872.55-8,776.66

Finding the Fourth Proportional to 15,851.20, 21,872.55 and 8,776.66

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Solution

The fourth proportional to 15,851.20, 21,872.55 and 8,776.66 is: 12,110.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.20 : 21,872.55 = 8,776.66 : x
  2. Step 2: Convert to fraction form
    15,851.20/21,872.55 = 8,776.66/x
  3. Step 3: Cross multiply
    15,851.20x = 21,872.55 × 8,776.66
  4. Step 4: Simplify right side
    15,851.20x = 191,967,934.68
  5. Step 5: Solve for x
    x = 191,967,934.68/15,851.20
  6. Step 6: Final answer
    x = 12,110.62

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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.