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Finding the Fourth Proportional to 39,867.39, 55,017 and 21,962.39

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Solution

The fourth proportional to 39,867.39, 55,017 and 21,962.39 is: 30,308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,867.39 : 55,017 = 21,962.39 : x
  2. Step 2: Convert to fraction form
    39,867.39/55,017 = 21,962.39/x
  3. Step 3: Cross multiply
    39,867.39x = 55,017 × 21,962.39
  4. Step 4: Simplify right side
    39,867.39x = 1,208,304,810.63
  5. Step 5: Solve for x
    x = 1,208,304,810.63/39,867.39
  6. Step 6: Final answer
    x = 30,308.10

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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.