Home / 39,779.97-54,897.78-21,876.36

Finding the Fourth Proportional to 39,779.97, 54,897.78 and 21,876.36

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Solution

The fourth proportional to 39,779.97, 54,897.78 and 21,876.36 is: 30,190.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,779.97 : 54,897.78 = 21,876.36 : x
  2. Step 2: Convert to fraction form
    39,779.97/54,897.78 = 21,876.36/x
  3. Step 3: Cross multiply
    39,779.97x = 54,897.78 × 21,876.36
  4. Step 4: Simplify right side
    39,779.97x = 1,200,963,598.48
  5. Step 5: Solve for x
    x = 1,200,963,598.48/39,779.97
  6. Step 6: Final answer
    x = 30,190.16

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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.