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Finding the Fourth Proportional to 17,515.71, 26,278.43 and 7,388.55

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Solution

The fourth proportional to 17,515.71, 26,278.43 and 7,388.55 is: 11,084.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,515.71 : 26,278.43 = 7,388.55 : x
  2. Step 2: Convert to fraction form
    17,515.71/26,278.43 = 7,388.55/x
  3. Step 3: Cross multiply
    17,515.71x = 26,278.43 × 7,388.55
  4. Step 4: Simplify right side
    17,515.71x = 194,159,457.03
  5. Step 5: Solve for x
    x = 194,159,457.03/17,515.71
  6. Step 6: Final answer
    x = 11,084.88

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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.