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Finding the Fourth Proportional to 17,641.39, 26,455.39 and 5,158.78

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Solution

The fourth proportional to 17,641.39, 26,455.39 and 5,158.78 is: 7,736.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,641.39 : 26,455.39 = 5,158.78 : x
  2. Step 2: Convert to fraction form
    17,641.39/26,455.39 = 5,158.78/x
  3. Step 3: Cross multiply
    17,641.39x = 26,455.39 × 5,158.78
  4. Step 4: Simplify right side
    17,641.39x = 136,477,536.82
  5. Step 5: Solve for x
    x = 136,477,536.82/17,641.39
  6. Step 6: Final answer
    x = 7,736.21

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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.