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Finding the Fourth Proportional to 18,672.68, 28,017.25 and 9,905.44

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Solution

The fourth proportional to 18,672.68, 28,017.25 and 9,905.44 is: 14,862.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.68 : 28,017.25 = 9,905.44 : x
  2. Step 2: Convert to fraction form
    18,672.68/28,017.25 = 9,905.44/x
  3. Step 3: Cross multiply
    18,672.68x = 28,017.25 × 9,905.44
  4. Step 4: Simplify right side
    18,672.68x = 277,523,188.84
  5. Step 5: Solve for x
    x = 277,523,188.84/18,672.68
  6. Step 6: Final answer
    x = 14,862.53

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1.5x scale

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.