Home / 5,731.19-7,908.90-3,178.94

Finding the Fourth Proportional to 5,731.19, 7,908.90 and 3,178.94

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Solution

The fourth proportional to 5,731.19, 7,908.90 and 3,178.94 is: 4,386.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,731.19 : 7,908.90 = 3,178.94 : x
  2. Step 2: Convert to fraction form
    5,731.19/7,908.90 = 3,178.94/x
  3. Step 3: Cross multiply
    5,731.19x = 7,908.90 × 3,178.94
  4. Step 4: Simplify right side
    5,731.19x = 25,141,867.10
  5. Step 5: Solve for x
    x = 25,141,867.10/5,731.19
  6. Step 6: Final answer
    x = 4,386.85

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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.