Home / 3,989.66-5,495.45-2,808.68

Finding the Fourth Proportional to 3,989.66, 5,495.45 and 2,808.68

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Solution

The fourth proportional to 3,989.66, 5,495.45 and 2,808.68 is: 3,868.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.66 : 5,495.45 = 2,808.68 : x
  2. Step 2: Convert to fraction form
    3,989.66/5,495.45 = 2,808.68/x
  3. Step 3: Cross multiply
    3,989.66x = 5,495.45 × 2,808.68
  4. Step 4: Simplify right side
    3,989.66x = 15,434,918.99
  5. Step 5: Solve for x
    x = 15,434,918.99/3,989.66
  6. Step 6: Final answer
    x = 3,868.74

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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.