Home / 39,718.68-54,812.34-21,815.34

Finding the Fourth Proportional to 39,718.68, 54,812.34 and 21,815.34

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Solution

The fourth proportional to 39,718.68, 54,812.34 and 21,815.34 is: 30,105.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,718.68 : 54,812.34 = 21,815.34 : x
  2. Step 2: Convert to fraction form
    39,718.68/54,812.34 = 21,815.34/x
  3. Step 3: Cross multiply
    39,718.68x = 54,812.34 × 21,815.34
  4. Step 4: Simplify right side
    39,718.68x = 1,195,749,833.30
  5. Step 5: Solve for x
    x = 1,195,749,833.30/39,718.68
  6. Step 6: Final answer
    x = 30,105.48

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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.