Home / 20,922.20-28,873.30-11,490.76

Finding the Fourth Proportional to 20,922.20, 28,873.30 and 11,490.76

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Solution

The fourth proportional to 20,922.20, 28,873.30 and 11,490.76 is: 15,857.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.20 : 28,873.30 = 11,490.76 : x
  2. Step 2: Convert to fraction form
    20,922.20/28,873.30 = 11,490.76/x
  3. Step 3: Cross multiply
    20,922.20x = 28,873.30 × 11,490.76
  4. Step 4: Simplify right side
    20,922.20x = 331,776,189.62
  5. Step 5: Solve for x
    x = 331,776,189.62/20,922.20
  6. Step 6: Final answer
    x = 15,857.62

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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.