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Finding the Fourth Proportional to 21,958.46, 32,917.50 and 7,915.05

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Solution

The fourth proportional to 21,958.46, 32,917.50 and 7,915.05 is: 11,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.46 : 32,917.50 = 7,915.05 : x
  2. Step 2: Convert to fraction form
    21,958.46/32,917.50 = 7,915.05/x
  3. Step 3: Cross multiply
    21,958.46x = 32,917.50 × 7,915.05
  4. Step 4: Simplify right side
    21,958.46x = 260,543,658.38
  5. Step 5: Solve for x
    x = 260,543,658.38/21,958.46
  6. Step 6: Final answer
    x = 11,865.30

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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.