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Finding the Fourth Proportional to 17,679.76, 26,515.53 and 7,813.65

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Solution

The fourth proportional to 17,679.76, 26,515.53 and 7,813.65 is: 11,718.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,679.76 : 26,515.53 = 7,813.65 : x
  2. Step 2: Convert to fraction form
    17,679.76/26,515.53 = 7,813.65/x
  3. Step 3: Cross multiply
    17,679.76x = 26,515.53 × 7,813.65
  4. Step 4: Simplify right side
    17,679.76x = 207,183,070.98
  5. Step 5: Solve for x
    x = 207,183,070.98/17,679.76
  6. Step 6: Final answer
    x = 11,718.66

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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.