Home / 21,423.15-29,563.92-11,991.69

Finding the Fourth Proportional to 21,423.15, 29,563.92 and 11,991.69

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Solution

The fourth proportional to 21,423.15, 29,563.92 and 11,991.69 is: 16,548.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.15 : 29,563.92 = 11,991.69 : x
  2. Step 2: Convert to fraction form
    21,423.15/29,563.92 = 11,991.69/x
  3. Step 3: Cross multiply
    21,423.15x = 29,563.92 × 11,991.69
  4. Step 4: Simplify right side
    21,423.15x = 354,521,363.82
  5. Step 5: Solve for x
    x = 354,521,363.82/21,423.15
  6. Step 6: Final answer
    x = 16,548.52

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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.