Home / 20,882.87-28,818.21-11,322.78

Finding the Fourth Proportional to 20,882.87, 28,818.21 and 11,322.78

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Solution

The fourth proportional to 20,882.87, 28,818.21 and 11,322.78 is: 15,625.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.87 : 28,818.21 = 11,322.78 : x
  2. Step 2: Convert to fraction form
    20,882.87/28,818.21 = 11,322.78/x
  3. Step 3: Cross multiply
    20,882.87x = 28,818.21 × 11,322.78
  4. Step 4: Simplify right side
    20,882.87x = 326,302,251.82
  5. Step 5: Solve for x
    x = 326,302,251.82/20,882.87
  6. Step 6: Final answer
    x = 15,625.35

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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.