Home / 13,138.67-18,130.60-7,474.79

Finding the Fourth Proportional to 13,138.67, 18,130.60 and 7,474.79

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Solution

The fourth proportional to 13,138.67, 18,130.60 and 7,474.79 is: 10,314.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.67 : 18,130.60 = 7,474.79 : x
  2. Step 2: Convert to fraction form
    13,138.67/18,130.60 = 7,474.79/x
  3. Step 3: Cross multiply
    13,138.67x = 18,130.60 × 7,474.79
  4. Step 4: Simplify right side
    13,138.67x = 135,522,427.57
  5. Step 5: Solve for x
    x = 135,522,427.57/13,138.67
  6. Step 6: Final answer
    x = 10,314.78

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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.