Home / 21,135.65-29,167.18-11,704.21

Finding the Fourth Proportional to 21,135.65, 29,167.18 and 11,704.21

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Solution

The fourth proportional to 21,135.65, 29,167.18 and 11,704.21 is: 16,151.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.65 : 29,167.18 = 11,704.21 : x
  2. Step 2: Convert to fraction form
    21,135.65/29,167.18 = 11,704.21/x
  3. Step 3: Cross multiply
    21,135.65x = 29,167.18 × 11,704.21
  4. Step 4: Simplify right side
    21,135.65x = 341,378,799.83
  5. Step 5: Solve for x
    x = 341,378,799.83/21,135.65
  6. Step 6: Final answer
    x = 16,151.80

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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.