Home / 2,887.20-3,986.64-2,005.92

Finding the Fourth Proportional to 2,887.20, 3,986.64 and 2,005.92

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Solution

The fourth proportional to 2,887.20, 3,986.64 and 2,005.92 is: 2,769.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.20 : 3,986.64 = 2,005.92 : x
  2. Step 2: Convert to fraction form
    2,887.20/3,986.64 = 2,005.92/x
  3. Step 3: Cross multiply
    2,887.20x = 3,986.64 × 2,005.92
  4. Step 4: Simplify right side
    2,887.20x = 7,996,880.91
  5. Step 5: Solve for x
    x = 7,996,880.91/2,887.20
  6. Step 6: Final answer
    x = 2,769.77

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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.