Home / 2,135.61-3,186.88-1,889.57

Finding the Fourth Proportional to 2,135.61, 3,186.88 and 1,889.57

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Solution

The fourth proportional to 2,135.61, 3,186.88 and 1,889.57 is: 2,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.61 : 3,186.88 = 1,889.57 : x
  2. Step 2: Convert to fraction form
    2,135.61/3,186.88 = 1,889.57/x
  3. Step 3: Cross multiply
    2,135.61x = 3,186.88 × 1,889.57
  4. Step 4: Simplify right side
    2,135.61x = 6,021,836.08
  5. Step 5: Solve for x
    x = 6,021,836.08/2,135.61
  6. Step 6: Final answer
    x = 2,819.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.