Home / 21,000.45-31,524.98-12,122.85

Finding the Fourth Proportional to 21,000.45, 31,524.98 and 12,122.85

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Solution

The fourth proportional to 21,000.45, 31,524.98 and 12,122.85 is: 18,198.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.45 : 31,524.98 = 12,122.85 : x
  2. Step 2: Convert to fraction form
    21,000.45/31,524.98 = 12,122.85/x
  3. Step 3: Cross multiply
    21,000.45x = 31,524.98 × 12,122.85
  4. Step 4: Simplify right side
    21,000.45x = 382,172,543.18
  5. Step 5: Solve for x
    x = 382,172,543.18/21,000.45
  6. Step 6: Final answer
    x = 18,198.30

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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.