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Finding the Fourth Proportional to 18,793.22, 28,196.03 and 8,931.47

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Solution

The fourth proportional to 18,793.22, 28,196.03 and 8,931.47 is: 13,400.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.22 : 28,196.03 = 8,931.47 : x
  2. Step 2: Convert to fraction form
    18,793.22/28,196.03 = 8,931.47/x
  3. Step 3: Cross multiply
    18,793.22x = 28,196.03 × 8,931.47
  4. Step 4: Simplify right side
    18,793.22x = 251,831,877.41
  5. Step 5: Solve for x
    x = 251,831,877.41/18,793.22
  6. Step 6: Final answer
    x = 13,400.15

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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.