Home / 21,239.06-29,310.35-11,678.85

Finding the Fourth Proportional to 21,239.06, 29,310.35 and 11,678.85

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Solution

The fourth proportional to 21,239.06, 29,310.35 and 11,678.85 is: 16,117.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.06 : 29,310.35 = 11,678.85 : x
  2. Step 2: Convert to fraction form
    21,239.06/29,310.35 = 11,678.85/x
  3. Step 3: Cross multiply
    21,239.06x = 29,310.35 × 11,678.85
  4. Step 4: Simplify right side
    21,239.06x = 342,311,122.70
  5. Step 5: Solve for x
    x = 342,311,122.70/21,239.06
  6. Step 6: Final answer
    x = 16,117.06

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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.