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Finding the Fourth Proportional to 21,958.43, 32,933.90 and 7,915.66

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Solution

The fourth proportional to 21,958.43, 32,933.90 and 7,915.66 is: 11,872.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.43 : 32,933.90 = 7,915.66 : x
  2. Step 2: Convert to fraction form
    21,958.43/32,933.90 = 7,915.66/x
  3. Step 3: Cross multiply
    21,958.43x = 32,933.90 × 7,915.66
  4. Step 4: Simplify right side
    21,958.43x = 260,693,492.33
  5. Step 5: Solve for x
    x = 260,693,492.33/21,958.43
  6. Step 6: Final answer
    x = 11,872.14

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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.