Home / 39,760.31-54,869.34-21,857.15

Finding the Fourth Proportional to 39,760.31, 54,869.34 and 21,857.15

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Solution

The fourth proportional to 39,760.31, 54,869.34 and 21,857.15 is: 30,162.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,760.31 : 54,869.34 = 21,857.15 : x
  2. Step 2: Convert to fraction form
    39,760.31/54,869.34 = 21,857.15/x
  3. Step 3: Cross multiply
    39,760.31x = 54,869.34 × 21,857.15
  4. Step 4: Simplify right side
    39,760.31x = 1,199,287,120.43
  5. Step 5: Solve for x
    x = 1,199,287,120.43/39,760.31
  6. Step 6: Final answer
    x = 30,162.93

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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.