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Finding the Fourth Proportional to 17,681.87, 26,522.81 and 8,419.79

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Solution

The fourth proportional to 17,681.87, 26,522.81 and 8,419.79 is: 12,629.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,681.87 : 26,522.81 = 8,419.79 : x
  2. Step 2: Convert to fraction form
    17,681.87/26,522.81 = 8,419.79/x
  3. Step 3: Cross multiply
    17,681.87x = 26,522.81 × 8,419.79
  4. Step 4: Simplify right side
    17,681.87x = 223,316,448.31
  5. Step 5: Solve for x
    x = 223,316,448.31/17,681.87
  6. Step 6: Final answer
    x = 12,629.69

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Double scale
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Similar ratio
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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.