Home / 39,781.50-54,897.99-21,875.43

Finding the Fourth Proportional to 39,781.50, 54,897.99 and 21,875.43

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Solution

The fourth proportional to 39,781.50, 54,897.99 and 21,875.43 is: 30,187.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.50 : 54,897.99 = 21,875.43 : x
  2. Step 2: Convert to fraction form
    39,781.50/54,897.99 = 21,875.43/x
  3. Step 3: Cross multiply
    39,781.50x = 54,897.99 × 21,875.43
  4. Step 4: Simplify right side
    39,781.50x = 1,200,917,137.39
  5. Step 5: Solve for x
    x = 1,200,917,137.39/39,781.50
  6. Step 6: Final answer
    x = 30,187.83

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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.