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Finding the Fourth Proportional to 11,178.88, 16,746.72 and 8,712.88

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Solution

The fourth proportional to 11,178.88, 16,746.72 and 8,712.88 is: 13,052.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,178.88 : 16,746.72 = 8,712.88 : x
  2. Step 2: Convert to fraction form
    11,178.88/16,746.72 = 8,712.88/x
  3. Step 3: Cross multiply
    11,178.88x = 16,746.72 × 8,712.88
  4. Step 4: Simplify right side
    11,178.88x = 145,912,161.75
  5. Step 5: Solve for x
    x = 145,912,161.75/11,178.88
  6. Step 6: Final answer
    x = 13,052.48

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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.