Home / 13,620.38-20,431.90-5,301.07

Finding the Fourth Proportional to 13,620.38, 20,431.90 and 5,301.07

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Solution

The fourth proportional to 13,620.38, 20,431.90 and 5,301.07 is: 7,952.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.38 : 20,431.90 = 5,301.07 : x
  2. Step 2: Convert to fraction form
    13,620.38/20,431.90 = 5,301.07/x
  3. Step 3: Cross multiply
    13,620.38x = 20,431.90 × 5,301.07
  4. Step 4: Simplify right side
    13,620.38x = 108,310,956.71
  5. Step 5: Solve for x
    x = 108,310,956.71/13,620.38
  6. Step 6: Final answer
    x = 7,952.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.