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Finding the Fourth Proportional to 5,139.98, 7,092.90 and 3,015.22

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Solution

The fourth proportional to 5,139.98, 7,092.90 and 3,015.22 is: 4,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.98 : 7,092.90 = 3,015.22 : x
  2. Step 2: Convert to fraction form
    5,139.98/7,092.90 = 3,015.22/x
  3. Step 3: Cross multiply
    5,139.98x = 7,092.90 × 3,015.22
  4. Step 4: Simplify right side
    5,139.98x = 21,386,618.47
  5. Step 5: Solve for x
    x = 21,386,618.47/5,139.98
  6. Step 6: Final answer
    x = 4,160.84

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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.