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Finding the Fourth Proportional to 28,648.90, 42,982.47 and 18,184.11

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Solution

The fourth proportional to 28,648.90, 42,982.47 and 18,184.11 is: 27,281.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.90 : 42,982.47 = 18,184.11 : x
  2. Step 2: Convert to fraction form
    28,648.90/42,982.47 = 18,184.11/x
  3. Step 3: Cross multiply
    28,648.90x = 42,982.47 × 18,184.11
  4. Step 4: Simplify right side
    28,648.90x = 781,597,962.55
  5. Step 5: Solve for x
    x = 781,597,962.55/28,648.90
  6. Step 6: Final answer
    x = 27,281.95

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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.