Home / 13,749.78-20,624.76-5,429.46

Finding the Fourth Proportional to 13,749.78, 20,624.76 and 5,429.46

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Solution

The fourth proportional to 13,749.78, 20,624.76 and 5,429.46 is: 8,144.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.78 : 20,624.76 = 5,429.46 : x
  2. Step 2: Convert to fraction form
    13,749.78/20,624.76 = 5,429.46/x
  3. Step 3: Cross multiply
    13,749.78x = 20,624.76 × 5,429.46
  4. Step 4: Simplify right side
    13,749.78x = 111,981,309.43
  5. Step 5: Solve for x
    x = 111,981,309.43/13,749.78
  6. Step 6: Final answer
    x = 8,144.23

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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.