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Finding the Fourth Proportional to 21,706.20, 32,551.20 and 8,555.85

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Solution

The fourth proportional to 21,706.20, 32,551.20 and 8,555.85 is: 12,830.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,706.20 : 32,551.20 = 8,555.85 : x
  2. Step 2: Convert to fraction form
    21,706.20/32,551.20 = 8,555.85/x
  3. Step 3: Cross multiply
    21,706.20x = 32,551.20 × 8,555.85
  4. Step 4: Simplify right side
    21,706.20x = 278,503,184.52
  5. Step 5: Solve for x
    x = 278,503,184.52/21,706.20
  6. Step 6: Final answer
    x = 12,830.58

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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.