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Finding the Fourth Proportional to 18,850.32, 28,257.48 and 8,845.20

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Solution

The fourth proportional to 18,850.32, 28,257.48 and 8,845.20 is: 13,259.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.32 : 28,257.48 = 8,845.20 : x
  2. Step 2: Convert to fraction form
    18,850.32/28,257.48 = 8,845.20/x
  3. Step 3: Cross multiply
    18,850.32x = 28,257.48 × 8,845.20
  4. Step 4: Simplify right side
    18,850.32x = 249,943,062.10
  5. Step 5: Solve for x
    x = 249,943,062.10/18,850.32
  6. Step 6: Final answer
    x = 13,259.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.