Home / 21,867.62-30,178.85-12,308.42

Finding the Fourth Proportional to 21,867.62, 30,178.85 and 12,308.42

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Solution

The fourth proportional to 21,867.62, 30,178.85 and 12,308.42 is: 16,986.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.62 : 30,178.85 = 12,308.42 : x
  2. Step 2: Convert to fraction form
    21,867.62/30,178.85 = 12,308.42/x
  3. Step 3: Cross multiply
    21,867.62x = 30,178.85 × 12,308.42
  4. Step 4: Simplify right side
    21,867.62x = 371,453,974.82
  5. Step 5: Solve for x
    x = 371,453,974.82/21,867.62
  6. Step 6: Final answer
    x = 16,986.49

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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.