Home / 5,135.32-7,086.66-2,897.20

Finding the Fourth Proportional to 5,135.32, 7,086.66 and 2,897.20

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Solution

The fourth proportional to 5,135.32, 7,086.66 and 2,897.20 is: 3,998.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.32 : 7,086.66 = 2,897.20 : x
  2. Step 2: Convert to fraction form
    5,135.32/7,086.66 = 2,897.20/x
  3. Step 3: Cross multiply
    5,135.32x = 7,086.66 × 2,897.20
  4. Step 4: Simplify right side
    5,135.32x = 20,531,471.35
  5. Step 5: Solve for x
    x = 20,531,471.35/5,135.32
  6. Step 6: Final answer
    x = 3,998.09

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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.