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Finding the Fourth Proportional to 39,167, 54,050.40 and 21,261.88

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Solution

The fourth proportional to 39,167, 54,050.40 and 21,261.88 is: 29,341.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,167 : 54,050.40 = 21,261.88 : x
  2. Step 2: Convert to fraction form
    39,167/54,050.40 = 21,261.88/x
  3. Step 3: Cross multiply
    39,167x = 54,050.40 × 21,261.88
  4. Step 4: Simplify right side
    39,167x = 1,149,213,118.75
  5. Step 5: Solve for x
    x = 1,149,213,118.75/39,167
  6. Step 6: Final answer
    x = 29,341.36

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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.