Home / 39,721.76-54,817.55-21,817.52

Finding the Fourth Proportional to 39,721.76, 54,817.55 and 21,817.52

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Solution

The fourth proportional to 39,721.76, 54,817.55 and 21,817.52 is: 30,109.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.76 : 54,817.55 = 21,817.52 : x
  2. Step 2: Convert to fraction form
    39,721.76/54,817.55 = 21,817.52/x
  3. Step 3: Cross multiply
    39,721.76x = 54,817.55 × 21,817.52
  4. Step 4: Simplify right side
    39,721.76x = 1,195,982,993.48
  5. Step 5: Solve for x
    x = 1,195,982,993.48/39,721.76
  6. Step 6: Final answer
    x = 30,109.01

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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.