Home / 9,338.96-12,887.16-5,147.21

Finding the Fourth Proportional to 9,338.96, 12,887.16 and 5,147.21

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Solution

The fourth proportional to 9,338.96, 12,887.16 and 5,147.21 is: 7,102.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,338.96 : 12,887.16 = 5,147.21 : x
  2. Step 2: Convert to fraction form
    9,338.96/12,887.16 = 5,147.21/x
  3. Step 3: Cross multiply
    9,338.96x = 12,887.16 × 5,147.21
  4. Step 4: Simplify right side
    9,338.96x = 66,332,918.82
  5. Step 5: Solve for x
    x = 66,332,918.82/9,338.96
  6. Step 6: Final answer
    x = 7,102.82

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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.