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Finding the Fourth Proportional to 21,958.57, 32,934.09 and 7,915.80

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Solution

The fourth proportional to 21,958.57, 32,934.09 and 7,915.80 is: 11,872.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.57 : 32,934.09 = 7,915.80 : x
  2. Step 2: Convert to fraction form
    21,958.57/32,934.09 = 7,915.80/x
  3. Step 3: Cross multiply
    21,958.57x = 32,934.09 × 7,915.80
  4. Step 4: Simplify right side
    21,958.57x = 260,699,669.62
  5. Step 5: Solve for x
    x = 260,699,669.62/21,958.57
  6. Step 6: Final answer
    x = 11,872.35

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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.