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Finding the Fourth Proportional to 17,687.10, 26,522.55 and 7,821.30

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Solution

The fourth proportional to 17,687.10, 26,522.55 and 7,821.30 is: 11,728.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,687.10 : 26,522.55 = 7,821.30 : x
  2. Step 2: Convert to fraction form
    17,687.10/26,522.55 = 7,821.30/x
  3. Step 3: Cross multiply
    17,687.10x = 26,522.55 × 7,821.30
  4. Step 4: Simplify right side
    17,687.10x = 207,440,820.32
  5. Step 5: Solve for x
    x = 207,440,820.32/17,687.10
  6. Step 6: Final answer
    x = 11,728.37

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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.