Home / 21,165.92-29,207.55-12,213.80

Finding the Fourth Proportional to 21,165.92, 29,207.55 and 12,213.80

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Solution

The fourth proportional to 21,165.92, 29,207.55 and 12,213.80 is: 16,854.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.92 : 29,207.55 = 12,213.80 : x
  2. Step 2: Convert to fraction form
    21,165.92/29,207.55 = 12,213.80/x
  3. Step 3: Cross multiply
    21,165.92x = 29,207.55 × 12,213.80
  4. Step 4: Simplify right side
    21,165.92x = 356,735,174.19
  5. Step 5: Solve for x
    x = 356,735,174.19/21,165.92
  6. Step 6: Final answer
    x = 16,854.22

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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.