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Finding the Fourth Proportional to 12,195.36, 16,812.36 and 8,657.28

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Solution

The fourth proportional to 12,195.36, 16,812.36 and 8,657.28 is: 11,934.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,195.36 : 16,812.36 = 8,657.28 : x
  2. Step 2: Convert to fraction form
    12,195.36/16,812.36 = 8,657.28/x
  3. Step 3: Cross multiply
    12,195.36x = 16,812.36 × 8,657.28
  4. Step 4: Simplify right side
    12,195.36x = 145,549,307.98
  5. Step 5: Solve for x
    x = 145,549,307.98/12,195.36
  6. Step 6: Final answer
    x = 11,934.81

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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.