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Finding the Fourth Proportional to 15,767.53, 21,758.19 and 8,694.01

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Solution

The fourth proportional to 15,767.53, 21,758.19 and 8,694.01 is: 11,997.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,767.53 : 21,758.19 = 8,694.01 : x
  2. Step 2: Convert to fraction form
    15,767.53/21,758.19 = 8,694.01/x
  3. Step 3: Cross multiply
    15,767.53x = 21,758.19 × 8,694.01
  4. Step 4: Simplify right side
    15,767.53x = 189,165,834.39
  5. Step 5: Solve for x
    x = 189,165,834.39/15,767.53
  6. Step 6: Final answer
    x = 11,997.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.