Home / 21,008.52-31,512.67-12,118.09

Finding the Fourth Proportional to 21,008.52, 31,512.67 and 12,118.09

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Solution

The fourth proportional to 21,008.52, 31,512.67 and 12,118.09 is: 18,177.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.52 : 31,512.67 = 12,118.09 : x
  2. Step 2: Convert to fraction form
    21,008.52/31,512.67 = 12,118.09/x
  3. Step 3: Cross multiply
    21,008.52x = 31,512.67 × 12,118.09
  4. Step 4: Simplify right side
    21,008.52x = 381,873,262.12
  5. Step 5: Solve for x
    x = 381,873,262.12/21,008.52
  6. Step 6: Final answer
    x = 18,177.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.