Home / 39,781.34-54,897.53-21,876.39

Finding the Fourth Proportional to 39,781.34, 54,897.53 and 21,876.39

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Solution

The fourth proportional to 39,781.34, 54,897.53 and 21,876.39 is: 30,189.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.34 : 54,897.53 = 21,876.39 : x
  2. Step 2: Convert to fraction form
    39,781.34/54,897.53 = 21,876.39/x
  3. Step 3: Cross multiply
    39,781.34x = 54,897.53 × 21,876.39
  4. Step 4: Simplify right side
    39,781.34x = 1,200,959,666.93
  5. Step 5: Solve for x
    x = 1,200,959,666.93/39,781.34
  6. Step 6: Final answer
    x = 30,189.02

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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.