Home / 21,242.20-29,315.22-11,813.80

Finding the Fourth Proportional to 21,242.20, 29,315.22 and 11,813.80

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Solution

The fourth proportional to 21,242.20, 29,315.22 and 11,813.80 is: 16,303.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.20 : 29,315.22 = 11,813.80 : x
  2. Step 2: Convert to fraction form
    21,242.20/29,315.22 = 11,813.80/x
  3. Step 3: Cross multiply
    21,242.20x = 29,315.22 × 11,813.80
  4. Step 4: Simplify right side
    21,242.20x = 346,324,146.04
  5. Step 5: Solve for x
    x = 346,324,146.04/21,242.20
  6. Step 6: Final answer
    x = 16,303.59

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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.