Home / 20,956.38-28,920.41-11,525.55

Finding the Fourth Proportional to 20,956.38, 28,920.41 and 11,525.55

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Solution

The fourth proportional to 20,956.38, 28,920.41 and 11,525.55 is: 15,905.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.38 : 28,920.41 = 11,525.55 : x
  2. Step 2: Convert to fraction form
    20,956.38/28,920.41 = 11,525.55/x
  3. Step 3: Cross multiply
    20,956.38x = 28,920.41 × 11,525.55
  4. Step 4: Simplify right side
    20,956.38x = 333,323,631.48
  5. Step 5: Solve for x
    x = 333,323,631.48/20,956.38
  6. Step 6: Final answer
    x = 15,905.59

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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.