Home / 11,138.92-15,363.27-7,157.87

Finding the Fourth Proportional to 11,138.92, 15,363.27 and 7,157.87

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Solution

The fourth proportional to 11,138.92, 15,363.27 and 7,157.87 is: 9,872.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.92 : 15,363.27 = 7,157.87 : x
  2. Step 2: Convert to fraction form
    11,138.92/15,363.27 = 7,157.87/x
  3. Step 3: Cross multiply
    11,138.92x = 15,363.27 × 7,157.87
  4. Step 4: Simplify right side
    11,138.92x = 109,968,270.23
  5. Step 5: Solve for x
    x = 109,968,270.23/11,138.92
  6. Step 6: Final answer
    x = 9,872.44

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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.