Home / 21,766.11-30,039.66-12,815.85

Finding the Fourth Proportional to 21,766.11, 30,039.66 and 12,815.85

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Solution

The fourth proportional to 21,766.11, 30,039.66 and 12,815.85 is: 17,687.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,766.11 : 30,039.66 = 12,815.85 : x
  2. Step 2: Convert to fraction form
    21,766.11/30,039.66 = 12,815.85/x
  3. Step 3: Cross multiply
    21,766.11x = 30,039.66 × 12,815.85
  4. Step 4: Simplify right side
    21,766.11x = 384,983,776.61
  5. Step 5: Solve for x
    x = 384,983,776.61/21,766.11
  6. Step 6: Final answer
    x = 17,687.30

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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.