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Finding the Fourth Proportional to 11,278.80, 16,934.40 and 8,816.40

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Solution

The fourth proportional to 11,278.80, 16,934.40 and 8,816.40 is: 13,237.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.80 : 16,934.40 = 8,816.40 : x
  2. Step 2: Convert to fraction form
    11,278.80/16,934.40 = 8,816.40/x
  3. Step 3: Cross multiply
    11,278.80x = 16,934.40 × 8,816.40
  4. Step 4: Simplify right side
    11,278.80x = 149,300,444.16
  5. Step 5: Solve for x
    x = 149,300,444.16/11,278.80
  6. Step 6: Final answer
    x = 13,237.26

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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.