Home / 39,721.08-54,815.75-21,817.74

Finding the Fourth Proportional to 39,721.08, 54,815.75 and 21,817.74

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Solution

The fourth proportional to 39,721.08, 54,815.75 and 21,817.74 is: 30,108.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.08 : 54,815.75 = 21,817.74 : x
  2. Step 2: Convert to fraction form
    39,721.08/54,815.75 = 21,817.74/x
  3. Step 3: Cross multiply
    39,721.08x = 54,815.75 × 21,817.74
  4. Step 4: Simplify right side
    39,721.08x = 1,195,955,781.41
  5. Step 5: Solve for x
    x = 1,195,955,781.41/39,721.08
  6. Step 6: Final answer
    x = 30,108.84

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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.