Home / 39,884.84-55,043.48-21,979.80

Finding the Fourth Proportional to 39,884.84, 55,043.48 and 21,979.80

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Solution

The fourth proportional to 39,884.84, 55,043.48 and 21,979.80 is: 30,333.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.84 : 55,043.48 = 21,979.80 : x
  2. Step 2: Convert to fraction form
    39,884.84/55,043.48 = 21,979.80/x
  3. Step 3: Cross multiply
    39,884.84x = 55,043.48 × 21,979.80
  4. Step 4: Simplify right side
    39,884.84x = 1,209,844,681.70
  5. Step 5: Solve for x
    x = 1,209,844,681.70/39,884.84
  6. Step 6: Final answer
    x = 30,333.45

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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.