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Finding the Fourth Proportional to 21,809.52, 32,716.40 and 8,658.95

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Solution

The fourth proportional to 21,809.52, 32,716.40 and 8,658.95 is: 12,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.52 : 32,716.40 = 8,658.95 : x
  2. Step 2: Convert to fraction form
    21,809.52/32,716.40 = 8,658.95/x
  3. Step 3: Cross multiply
    21,809.52x = 32,716.40 × 8,658.95
  4. Step 4: Simplify right side
    21,809.52x = 283,289,464.90
  5. Step 5: Solve for x
    x = 283,289,464.90/21,809.52
  6. Step 6: Final answer
    x = 12,989.26

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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.