Home / 18,207.68-25,128.48-11,138.80

Finding the Fourth Proportional to 18,207.68, 25,128.48 and 11,138.80

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Solution

The fourth proportional to 18,207.68, 25,128.48 and 11,138.80 is: 15,372.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,207.68 : 25,128.48 = 11,138.80 : x
  2. Step 2: Convert to fraction form
    18,207.68/25,128.48 = 11,138.80/x
  3. Step 3: Cross multiply
    18,207.68x = 25,128.48 × 11,138.80
  4. Step 4: Simplify right side
    18,207.68x = 279,901,113.02
  5. Step 5: Solve for x
    x = 279,901,113.02/18,207.68
  6. Step 6: Final answer
    x = 15,372.70

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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.