Home / 39,721.14-54,815.54-21,816.50

Finding the Fourth Proportional to 39,721.14, 54,815.54 and 21,816.50

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Solution

The fourth proportional to 39,721.14, 54,815.54 and 21,816.50 is: 30,106.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.14 : 54,815.54 = 21,816.50 : x
  2. Step 2: Convert to fraction form
    39,721.14/54,815.54 = 21,816.50/x
  3. Step 3: Cross multiply
    39,721.14x = 54,815.54 × 21,816.50
  4. Step 4: Simplify right side
    39,721.14x = 1,195,883,228.41
  5. Step 5: Solve for x
    x = 1,195,883,228.41/39,721.14
  6. Step 6: Final answer
    x = 30,106.97

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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.