Home / 3,909.65-5,395.34-2,141.42

Finding the Fourth Proportional to 3,909.65, 5,395.34 and 2,141.42

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Solution

The fourth proportional to 3,909.65, 5,395.34 and 2,141.42 is: 2,955.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.65 : 5,395.34 = 2,141.42 : x
  2. Step 2: Convert to fraction form
    3,909.65/5,395.34 = 2,141.42/x
  3. Step 3: Cross multiply
    3,909.65x = 5,395.34 × 2,141.42
  4. Step 4: Simplify right side
    3,909.65x = 11,553,678.28
  5. Step 5: Solve for x
    x = 11,553,678.28/3,909.65
  6. Step 6: Final answer
    x = 2,955.17

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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.