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Finding the Fourth Proportional to 9,415.97, 12,993.53 and 5,166.97

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Solution

The fourth proportional to 9,415.97, 12,993.53 and 5,166.97 is: 7,130.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.97 : 12,993.53 = 5,166.97 : x
  2. Step 2: Convert to fraction form
    9,415.97/12,993.53 = 5,166.97/x
  3. Step 3: Cross multiply
    9,415.97x = 12,993.53 × 5,166.97
  4. Step 4: Simplify right side
    9,415.97x = 67,137,121.39
  5. Step 5: Solve for x
    x = 67,137,121.39/9,415.97
  6. Step 6: Final answer
    x = 7,130.13

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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.