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Finding the Fourth Proportional to 11,278.80, 16,916.22 and 4,259.43

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Solution

The fourth proportional to 11,278.80, 16,916.22 and 4,259.43 is: 6,388.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.80 : 16,916.22 = 4,259.43 : x
  2. Step 2: Convert to fraction form
    11,278.80/16,916.22 = 4,259.43/x
  3. Step 3: Cross multiply
    11,278.80x = 16,916.22 × 4,259.43
  4. Step 4: Simplify right side
    11,278.80x = 72,053,454.95
  5. Step 5: Solve for x
    x = 72,053,454.95/11,278.80
  6. Step 6: Final answer
    x = 6,388.40

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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.