Home / 39,243.75-54,152.85-21,781.53

Finding the Fourth Proportional to 39,243.75, 54,152.85 and 21,781.53

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Solution

The fourth proportional to 39,243.75, 54,152.85 and 21,781.53 is: 30,056.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,243.75 : 54,152.85 = 21,781.53 : x
  2. Step 2: Convert to fraction form
    39,243.75/54,152.85 = 21,781.53/x
  3. Step 3: Cross multiply
    39,243.75x = 54,152.85 × 21,781.53
  4. Step 4: Simplify right side
    39,243.75x = 1,179,531,926.86
  5. Step 5: Solve for x
    x = 1,179,531,926.86/39,243.75
  6. Step 6: Final answer
    x = 30,056.55

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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.