Home / 5,009.11-6,912.64-3,121.45

Finding the Fourth Proportional to 5,009.11, 6,912.64 and 3,121.45

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Solution

The fourth proportional to 5,009.11, 6,912.64 and 3,121.45 is: 4,307.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,009.11 : 6,912.64 = 3,121.45 : x
  2. Step 2: Convert to fraction form
    5,009.11/6,912.64 = 3,121.45/x
  3. Step 3: Cross multiply
    5,009.11x = 6,912.64 × 3,121.45
  4. Step 4: Simplify right side
    5,009.11x = 21,577,468.07
  5. Step 5: Solve for x
    x = 21,577,468.07/5,009.11
  6. Step 6: Final answer
    x = 4,307.65

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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.