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Finding the Fourth Proportional to 12,657.62, 18,983.64 and 8,949.26

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Solution

The fourth proportional to 12,657.62, 18,983.64 and 8,949.26 is: 13,421.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.62 : 18,983.64 = 8,949.26 : x
  2. Step 2: Convert to fraction form
    12,657.62/18,983.64 = 8,949.26/x
  3. Step 3: Cross multiply
    12,657.62x = 18,983.64 × 8,949.26
  4. Step 4: Simplify right side
    12,657.62x = 169,889,530.11
  5. Step 5: Solve for x
    x = 169,889,530.11/12,657.62
  6. Step 6: Final answer
    x = 13,421.92

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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.