Home / 39,839.05-54,978.38-21,935.28

Finding the Fourth Proportional to 39,839.05, 54,978.38 and 21,935.28

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Solution

The fourth proportional to 39,839.05, 54,978.38 and 21,935.28 is: 30,270.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,839.05 : 54,978.38 = 21,935.28 : x
  2. Step 2: Convert to fraction form
    39,839.05/54,978.38 = 21,935.28/x
  3. Step 3: Cross multiply
    39,839.05x = 54,978.38 × 21,935.28
  4. Step 4: Simplify right side
    39,839.05x = 1,205,966,159.25
  5. Step 5: Solve for x
    x = 1,205,966,159.25/39,839.05
  6. Step 6: Final answer
    x = 30,270.96

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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.