Home / 21,000.88-31,479.54-11,137.60

Finding the Fourth Proportional to 21,000.88, 31,479.54 and 11,137.60

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Solution

The fourth proportional to 21,000.88, 31,479.54 and 11,137.60 is: 16,694.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.88 : 31,479.54 = 11,137.60 : x
  2. Step 2: Convert to fraction form
    21,000.88/31,479.54 = 11,137.60/x
  3. Step 3: Cross multiply
    21,000.88x = 31,479.54 × 11,137.60
  4. Step 4: Simplify right side
    21,000.88x = 350,606,524.70
  5. Step 5: Solve for x
    x = 350,606,524.70/21,000.88
  6. Step 6: Final answer
    x = 16,694.85

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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.