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Finding the Fourth Proportional to 17,740.75, 26,611.14 and 5,428.75

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Solution

The fourth proportional to 17,740.75, 26,611.14 and 5,428.75 is: 8,143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,740.75 : 26,611.14 = 5,428.75 : x
  2. Step 2: Convert to fraction form
    17,740.75/26,611.14 = 5,428.75/x
  3. Step 3: Cross multiply
    17,740.75x = 26,611.14 × 5,428.75
  4. Step 4: Simplify right side
    17,740.75x = 144,465,226.28
  5. Step 5: Solve for x
    x = 144,465,226.28/17,740.75
  6. Step 6: Final answer
    x = 8,143.13

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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.