Home / 13,138.40-18,099.25-11,243.91

Finding the Fourth Proportional to 13,138.40, 18,099.25 and 11,243.91

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Solution

The fourth proportional to 13,138.40, 18,099.25 and 11,243.91 is: 15,489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.40 : 18,099.25 = 11,243.91 : x
  2. Step 2: Convert to fraction form
    13,138.40/18,099.25 = 11,243.91/x
  3. Step 3: Cross multiply
    13,138.40x = 18,099.25 × 11,243.91
  4. Step 4: Simplify right side
    13,138.40x = 203,506,377.83
  5. Step 5: Solve for x
    x = 203,506,377.83/13,138.40
  6. Step 6: Final answer
    x = 15,489.43

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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.