Home / 21,149.25-31,724.39-7,109.46

Finding the Fourth Proportional to 21,149.25, 31,724.39 and 7,109.46

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Solution

The fourth proportional to 21,149.25, 31,724.39 and 7,109.46 is: 10,664.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.25 : 31,724.39 = 7,109.46 : x
  2. Step 2: Convert to fraction form
    21,149.25/31,724.39 = 7,109.46/x
  3. Step 3: Cross multiply
    21,149.25x = 31,724.39 × 7,109.46
  4. Step 4: Simplify right side
    21,149.25x = 225,543,246.18
  5. Step 5: Solve for x
    x = 225,543,246.18/21,149.25
  6. Step 6: Final answer
    x = 10,664.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.