Home / 13,631.29-20,345.80-11,749.12

Finding the Fourth Proportional to 13,631.29, 20,345.80 and 11,749.12

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Solution

The fourth proportional to 13,631.29, 20,345.80 and 11,749.12 is: 17,536.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.29 : 20,345.80 = 11,749.12 : x
  2. Step 2: Convert to fraction form
    13,631.29/20,345.80 = 11,749.12/x
  3. Step 3: Cross multiply
    13,631.29x = 20,345.80 × 11,749.12
  4. Step 4: Simplify right side
    13,631.29x = 239,045,245.70
  5. Step 5: Solve for x
    x = 239,045,245.70/13,631.29
  6. Step 6: Final answer
    x = 17,536.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.