Home / 20,426.38-28,189.72-11,353.06

Finding the Fourth Proportional to 20,426.38, 28,189.72 and 11,353.06

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Solution

The fourth proportional to 20,426.38, 28,189.72 and 11,353.06 is: 15,667.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.38 : 28,189.72 = 11,353.06 : x
  2. Step 2: Convert to fraction form
    20,426.38/28,189.72 = 11,353.06/x
  3. Step 3: Cross multiply
    20,426.38x = 28,189.72 × 11,353.06
  4. Step 4: Simplify right side
    20,426.38x = 320,039,631.97
  5. Step 5: Solve for x
    x = 320,039,631.97/20,426.38
  6. Step 6: Final answer
    x = 15,667.96

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Double scale
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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.