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Finding the Fourth Proportional to 12,068.19, 16,636.65 and 8,472.20

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Solution

The fourth proportional to 12,068.19, 16,636.65 and 8,472.20 is: 11,679.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,068.19 : 16,636.65 = 8,472.20 : x
  2. Step 2: Convert to fraction form
    12,068.19/16,636.65 = 8,472.20/x
  3. Step 3: Cross multiply
    12,068.19x = 16,636.65 × 8,472.20
  4. Step 4: Simplify right side
    12,068.19x = 140,948,984.54
  5. Step 5: Solve for x
    x = 140,948,984.54/12,068.19
  6. Step 6: Final answer
    x = 11,679.38

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1.5x scale

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.