Home / 21,121.92-29,144.98-12,167.67

Finding the Fourth Proportional to 21,121.92, 29,144.98 and 12,167.67

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Solution

The fourth proportional to 21,121.92, 29,144.98 and 12,167.67 is: 16,789.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.92 : 29,144.98 = 12,167.67 : x
  2. Step 2: Convert to fraction form
    21,121.92/29,144.98 = 12,167.67/x
  3. Step 3: Cross multiply
    21,121.92x = 29,144.98 × 12,167.67
  4. Step 4: Simplify right side
    21,121.92x = 354,626,353.07
  5. Step 5: Solve for x
    x = 354,626,353.07/21,121.92
  6. Step 6: Final answer
    x = 16,789.50

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Double scale
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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.