Home / 20,922.28-28,874.16-11,490.94

Finding the Fourth Proportional to 20,922.28, 28,874.16 and 11,490.94

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Solution

The fourth proportional to 20,922.28, 28,874.16 and 11,490.94 is: 15,858.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.28 : 28,874.16 = 11,490.94 : x
  2. Step 2: Convert to fraction form
    20,922.28/28,874.16 = 11,490.94/x
  3. Step 3: Cross multiply
    20,922.28x = 28,874.16 × 11,490.94
  4. Step 4: Simplify right side
    20,922.28x = 331,791,240.11
  5. Step 5: Solve for x
    x = 331,791,240.11/20,922.28
  6. Step 6: Final answer
    x = 15,858.27

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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.