Home / 39,679.88-54,758.15-21,530.60

Finding the Fourth Proportional to 39,679.88, 54,758.15 and 21,530.60

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Solution

The fourth proportional to 39,679.88, 54,758.15 and 21,530.60 is: 29,712.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.88 : 54,758.15 = 21,530.60 : x
  2. Step 2: Convert to fraction form
    39,679.88/54,758.15 = 21,530.60/x
  3. Step 3: Cross multiply
    39,679.88x = 54,758.15 × 21,530.60
  4. Step 4: Simplify right side
    39,679.88x = 1,178,975,442.95
  5. Step 5: Solve for x
    x = 1,178,975,442.95/39,679.88
  6. Step 6: Final answer
    x = 29,712.18

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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.