Home / 39,721.98-54,817.32-21,818.65

Finding the Fourth Proportional to 39,721.98, 54,817.32 and 21,818.65

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Solution

The fourth proportional to 39,721.98, 54,817.32 and 21,818.65 is: 30,110.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.98 : 54,817.32 = 21,818.65 : x
  2. Step 2: Convert to fraction form
    39,721.98/54,817.32 = 21,818.65/x
  3. Step 3: Cross multiply
    39,721.98x = 54,817.32 × 21,818.65
  4. Step 4: Simplify right side
    39,721.98x = 1,196,039,919.02
  5. Step 5: Solve for x
    x = 1,196,039,919.02/39,721.98
  6. Step 6: Final answer
    x = 30,110.28

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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.