Home / 39,721.32-54,815.87-21,816.74

Finding the Fourth Proportional to 39,721.32, 54,815.87 and 21,816.74

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Solution

The fourth proportional to 39,721.32, 54,815.87 and 21,816.74 is: 30,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.32 : 54,815.87 = 21,816.74 : x
  2. Step 2: Convert to fraction form
    39,721.32/54,815.87 = 21,816.74/x
  3. Step 3: Cross multiply
    39,721.32x = 54,815.87 × 21,816.74
  4. Step 4: Simplify right side
    39,721.32x = 1,195,903,775.25
  5. Step 5: Solve for x
    x = 1,195,903,775.25/39,721.32
  6. Step 6: Final answer
    x = 30,107.35

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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.