Home / 3,988.31-5,504.15-2,309.78

Finding the Fourth Proportional to 3,988.31, 5,504.15 and 2,309.78

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Solution

The fourth proportional to 3,988.31, 5,504.15 and 2,309.78 is: 3,187.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.31 : 5,504.15 = 2,309.78 : x
  2. Step 2: Convert to fraction form
    3,988.31/5,504.15 = 2,309.78/x
  3. Step 3: Cross multiply
    3,988.31x = 5,504.15 × 2,309.78
  4. Step 4: Simplify right side
    3,988.31x = 12,713,395.12
  5. Step 5: Solve for x
    x = 12,713,395.12/3,988.31
  6. Step 6: Final answer
    x = 3,187.67

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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.