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Finding the Fourth Proportional to 18,638, 25,720.84 and 10,254.52

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Solution

The fourth proportional to 18,638, 25,720.84 and 10,254.52 is: 14,151.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638 : 25,720.84 = 10,254.52 : x
  2. Step 2: Convert to fraction form
    18,638/25,720.84 = 10,254.52/x
  3. Step 3: Cross multiply
    18,638x = 25,720.84 × 10,254.52
  4. Step 4: Simplify right side
    18,638x = 263,754,868.20
  5. Step 5: Solve for x
    x = 263,754,868.20/18,638
  6. Step 6: Final answer
    x = 14,151.46

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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.