Home / 39,759.23-54,871.23-21,857.70

Finding the Fourth Proportional to 39,759.23, 54,871.23 and 21,857.70

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Solution

The fourth proportional to 39,759.23, 54,871.23 and 21,857.70 is: 30,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,759.23 : 54,871.23 = 21,857.70 : x
  2. Step 2: Convert to fraction form
    39,759.23/54,871.23 = 21,857.70/x
  3. Step 3: Cross multiply
    39,759.23x = 54,871.23 × 21,857.70
  4. Step 4: Simplify right side
    39,759.23x = 1,199,358,883.97
  5. Step 5: Solve for x
    x = 1,199,358,883.97/39,759.23
  6. Step 6: Final answer
    x = 30,165.55

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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.