Home / 21,149.24-31,724.63-7,109.73

Finding the Fourth Proportional to 21,149.24, 31,724.63 and 7,109.73

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Solution

The fourth proportional to 21,149.24, 31,724.63 and 7,109.73 is: 10,664.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.24 : 31,724.63 = 7,109.73 : x
  2. Step 2: Convert to fraction form
    21,149.24/31,724.63 = 7,109.73/x
  3. Step 3: Cross multiply
    21,149.24x = 31,724.63 × 7,109.73
  4. Step 4: Simplify right side
    21,149.24x = 225,553,518.10
  5. Step 5: Solve for x
    x = 225,553,518.10/21,149.24
  6. Step 6: Final answer
    x = 10,664.85

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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.