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Finding the Fourth Proportional to 5,156.91, 7,116.09 and 2,918.26

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Solution

The fourth proportional to 5,156.91, 7,116.09 and 2,918.26 is: 4,026.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.91 : 7,116.09 = 2,918.26 : x
  2. Step 2: Convert to fraction form
    5,156.91/7,116.09 = 2,918.26/x
  3. Step 3: Cross multiply
    5,156.91x = 7,116.09 × 2,918.26
  4. Step 4: Simplify right side
    5,156.91x = 20,766,600.80
  5. Step 5: Solve for x
    x = 20,766,600.80/5,156.91
  6. Step 6: Final answer
    x = 4,026.95

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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.