Home / 18,381.33-25,343.82-15,543.63

Finding the Fourth Proportional to 18,381.33, 25,343.82 and 15,543.63

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Solution

The fourth proportional to 18,381.33, 25,343.82 and 15,543.63 is: 21,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.33 : 25,343.82 = 15,543.63 : x
  2. Step 2: Convert to fraction form
    18,381.33/25,343.82 = 15,543.63/x
  3. Step 3: Cross multiply
    18,381.33x = 25,343.82 × 15,543.63
  4. Step 4: Simplify right side
    18,381.33x = 393,934,960.87
  5. Step 5: Solve for x
    x = 393,934,960.87/18,381.33
  6. Step 6: Final answer
    x = 21,431.25

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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.