Home / 39,723.84-54,818.80-21,818.80

Finding the Fourth Proportional to 39,723.84, 54,818.80 and 21,818.80

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Solution

The fourth proportional to 39,723.84, 54,818.80 and 21,818.80 is: 30,109.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,723.84 : 54,818.80 = 21,818.80 : x
  2. Step 2: Convert to fraction form
    39,723.84/54,818.80 = 21,818.80/x
  3. Step 3: Cross multiply
    39,723.84x = 54,818.80 × 21,818.80
  4. Step 4: Simplify right side
    39,723.84x = 1,196,080,433.44
  5. Step 5: Solve for x
    x = 1,196,080,433.44/39,723.84
  6. Step 6: Final answer
    x = 30,109.89

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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.