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Finding the Fourth Proportional to 17,640.50, 26,460.75 and 7,912.50

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Solution

The fourth proportional to 17,640.50, 26,460.75 and 7,912.50 is: 11,868.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,640.50 : 26,460.75 = 7,912.50 : x
  2. Step 2: Convert to fraction form
    17,640.50/26,460.75 = 7,912.50/x
  3. Step 3: Cross multiply
    17,640.50x = 26,460.75 × 7,912.50
  4. Step 4: Simplify right side
    17,640.50x = 209,370,684.38
  5. Step 5: Solve for x
    x = 209,370,684.38/17,640.50
  6. Step 6: Final answer
    x = 11,868.75

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Double scale
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Similar ratio
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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.