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Finding the Fourth Proportional to 21,941.70, 32,915.25 and 7,146.65

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Solution

The fourth proportional to 21,941.70, 32,915.25 and 7,146.65 is: 10,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,941.70 : 32,915.25 = 7,146.65 : x
  2. Step 2: Convert to fraction form
    21,941.70/32,915.25 = 7,146.65/x
  3. Step 3: Cross multiply
    21,941.70x = 32,915.25 × 7,146.65
  4. Step 4: Simplify right side
    21,941.70x = 235,233,606.84
  5. Step 5: Solve for x
    x = 235,233,606.84/21,941.70
  6. Step 6: Final answer
    x = 10,720.85

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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.