Home / 39,721.20-54,815.58-21,816.42

Finding the Fourth Proportional to 39,721.20, 54,815.58 and 21,816.42

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Solution

The fourth proportional to 39,721.20, 54,815.58 and 21,816.42 is: 30,106.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.20 : 54,815.58 = 21,816.42 : x
  2. Step 2: Convert to fraction form
    39,721.20/54,815.58 = 21,816.42/x
  3. Step 3: Cross multiply
    39,721.20x = 54,815.58 × 21,816.42
  4. Step 4: Simplify right side
    39,721.20x = 1,195,879,715.82
  5. Step 5: Solve for x
    x = 1,195,879,715.82/39,721.20
  6. Step 6: Final answer
    x = 30,106.84

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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.