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Finding the Fourth Proportional to 17,719.40, 26,580.72 and 4,571.80

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Solution

The fourth proportional to 17,719.40, 26,580.72 and 4,571.80 is: 6,858.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,719.40 : 26,580.72 = 4,571.80 : x
  2. Step 2: Convert to fraction form
    17,719.40/26,580.72 = 4,571.80/x
  3. Step 3: Cross multiply
    17,719.40x = 26,580.72 × 4,571.80
  4. Step 4: Simplify right side
    17,719.40x = 121,521,735.70
  5. Step 5: Solve for x
    x = 121,521,735.70/17,719.40
  6. Step 6: Final answer
    x = 6,858.12

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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.