Home / 13,749.10-20,629.05-5,427.70

Finding the Fourth Proportional to 13,749.10, 20,629.05 and 5,427.70

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Solution

The fourth proportional to 13,749.10, 20,629.05 and 5,427.70 is: 8,143.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.10 : 20,629.05 = 5,427.70 : x
  2. Step 2: Convert to fraction form
    13,749.10/20,629.05 = 5,427.70/x
  3. Step 3: Cross multiply
    13,749.10x = 20,629.05 × 5,427.70
  4. Step 4: Simplify right side
    13,749.10x = 111,968,294.69
  5. Step 5: Solve for x
    x = 111,968,294.69/13,749.10
  6. Step 6: Final answer
    x = 8,143.68

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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.