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Finding the Fourth Proportional to 16,230, 22,397.40 and 8,778

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Solution

The fourth proportional to 16,230, 22,397.40 and 8,778 is: 12,113.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,230 : 22,397.40 = 8,778 : x
  2. Step 2: Convert to fraction form
    16,230/22,397.40 = 8,778/x
  3. Step 3: Cross multiply
    16,230x = 22,397.40 × 8,778
  4. Step 4: Simplify right side
    16,230x = 196,604,377.20
  5. Step 5: Solve for x
    x = 196,604,377.20/16,230
  6. Step 6: Final answer
    x = 12,113.64

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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.