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Finding the Fourth Proportional to 8,877.22, 12,255.00 and 5,521.11

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Solution

The fourth proportional to 8,877.22, 12,255.00 and 5,521.11 is: 7,621.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,877.22 : 12,255.00 = 5,521.11 : x
  2. Step 2: Convert to fraction form
    8,877.22/12,255.00 = 5,521.11/x
  3. Step 3: Cross multiply
    8,877.22x = 12,255.00 × 5,521.11
  4. Step 4: Simplify right side
    8,877.22x = 67,661,211.64
  5. Step 5: Solve for x
    x = 67,661,211.64/8,877.22
  6. Step 6: Final answer
    x = 7,621.89

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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.