Home / 21,909.30-30,234.80-11,837.72

Finding the Fourth Proportional to 21,909.30, 30,234.80 and 11,837.72

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Solution

The fourth proportional to 21,909.30, 30,234.80 and 11,837.72 is: 16,336.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.30 : 30,234.80 = 11,837.72 : x
  2. Step 2: Convert to fraction form
    21,909.30/30,234.80 = 11,837.72/x
  3. Step 3: Cross multiply
    21,909.30x = 30,234.80 × 11,837.72
  4. Step 4: Simplify right side
    21,909.30x = 357,910,886.29
  5. Step 5: Solve for x
    x = 357,910,886.29/21,909.30
  6. Step 6: Final answer
    x = 16,336.03

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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.