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Finding the Fourth Proportional to 17,991.75, 26,991.63 and 5,513.52

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Solution

The fourth proportional to 17,991.75, 26,991.63 and 5,513.52 is: 8,271.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.75 : 26,991.63 = 5,513.52 : x
  2. Step 2: Convert to fraction form
    17,991.75/26,991.63 = 5,513.52/x
  3. Step 3: Cross multiply
    17,991.75x = 26,991.63 × 5,513.52
  4. Step 4: Simplify right side
    17,991.75x = 148,818,891.84
  5. Step 5: Solve for x
    x = 148,818,891.84/17,991.75
  6. Step 6: Final answer
    x = 8,271.51

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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.