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Finding the Fourth Proportional to 12,657.28, 18,985.92 and 8,069.44

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Solution

The fourth proportional to 12,657.28, 18,985.92 and 8,069.44 is: 12,104.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.28 : 18,985.92 = 8,069.44 : x
  2. Step 2: Convert to fraction form
    12,657.28/18,985.92 = 8,069.44/x
  3. Step 3: Cross multiply
    12,657.28x = 18,985.92 × 8,069.44
  4. Step 4: Simplify right side
    12,657.28x = 153,205,742.28
  5. Step 5: Solve for x
    x = 153,205,742.28/12,657.28
  6. Step 6: Final answer
    x = 12,104.16

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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.