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Finding the Fourth Proportional to 5,008.71, 6,912.24 and 3,121.41

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Solution

The fourth proportional to 5,008.71, 6,912.24 and 3,121.41 is: 4,307.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,008.71 : 6,912.24 = 3,121.41 : x
  2. Step 2: Convert to fraction form
    5,008.71/6,912.24 = 3,121.41/x
  3. Step 3: Cross multiply
    5,008.71x = 6,912.24 × 3,121.41
  4. Step 4: Simplify right side
    5,008.71x = 21,575,935.06
  5. Step 5: Solve for x
    x = 21,575,935.06/5,008.71
  6. Step 6: Final answer
    x = 4,307.68

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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.