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Finding the Fourth Proportional to 18,581.80, 25,642.80 and 10,083.96

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Solution

The fourth proportional to 18,581.80, 25,642.80 and 10,083.96 is: 13,915.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581.80 : 25,642.80 = 10,083.96 : x
  2. Step 2: Convert to fraction form
    18,581.80/25,642.80 = 10,083.96/x
  3. Step 3: Cross multiply
    18,581.80x = 25,642.80 × 10,083.96
  4. Step 4: Simplify right side
    18,581.80x = 258,580,969.49
  5. Step 5: Solve for x
    x = 258,580,969.49/18,581.80
  6. Step 6: Final answer
    x = 13,915.82

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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.