Home / 9,415.25-12,993.18-5,166.25

Finding the Fourth Proportional to 9,415.25, 12,993.18 and 5,166.25

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Solution

The fourth proportional to 9,415.25, 12,993.18 and 5,166.25 is: 7,129.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.25 : 12,993.18 = 5,166.25 : x
  2. Step 2: Convert to fraction form
    9,415.25/12,993.18 = 5,166.25/x
  3. Step 3: Cross multiply
    9,415.25x = 12,993.18 × 5,166.25
  4. Step 4: Simplify right side
    9,415.25x = 67,125,983.69
  5. Step 5: Solve for x
    x = 67,125,983.69/9,415.25
  6. Step 6: Final answer
    x = 7,129.49

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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.