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Finding the Fourth Proportional to 21,800.31, 32,716.95 and 8,653.80

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Solution

The fourth proportional to 21,800.31, 32,716.95 and 8,653.80 is: 12,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.31 : 32,716.95 = 8,653.80 : x
  2. Step 2: Convert to fraction form
    21,800.31/32,716.95 = 8,653.80/x
  3. Step 3: Cross multiply
    21,800.31x = 32,716.95 × 8,653.80
  4. Step 4: Simplify right side
    21,800.31x = 283,125,941.91
  5. Step 5: Solve for x
    x = 283,125,941.91/21,800.31
  6. Step 6: Final answer
    x = 12,987.24

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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.