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Finding the Fourth Proportional to 8,827.80, 13,263.30 and 6,640.80

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Solution

The fourth proportional to 8,827.80, 13,263.30 and 6,640.80 is: 9,977.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,827.80 : 13,263.30 = 6,640.80 : x
  2. Step 2: Convert to fraction form
    8,827.80/13,263.30 = 6,640.80/x
  3. Step 3: Cross multiply
    8,827.80x = 13,263.30 × 6,640.80
  4. Step 4: Simplify right side
    8,827.80x = 88,078,922.64
  5. Step 5: Solve for x
    x = 88,078,922.64/8,827.80
  6. Step 6: Final answer
    x = 9,977.45

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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.