Home / 13,391.31-18,480.20-7,342.12

Finding the Fourth Proportional to 13,391.31, 18,480.20 and 7,342.12

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Solution

The fourth proportional to 13,391.31, 18,480.20 and 7,342.12 is: 10,132.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.31 : 18,480.20 = 7,342.12 : x
  2. Step 2: Convert to fraction form
    13,391.31/18,480.20 = 7,342.12/x
  3. Step 3: Cross multiply
    13,391.31x = 18,480.20 × 7,342.12
  4. Step 4: Simplify right side
    13,391.31x = 135,683,873.87
  5. Step 5: Solve for x
    x = 135,683,873.87/13,391.31
  6. Step 6: Final answer
    x = 10,132.23

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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.