Home / 21,135.24-29,179.62-15,162.12

Finding the Fourth Proportional to 21,135.24, 29,179.62 and 15,162.12

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Solution

The fourth proportional to 21,135.24, 29,179.62 and 15,162.12 is: 20,933.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.24 : 29,179.62 = 15,162.12 : x
  2. Step 2: Convert to fraction form
    21,135.24/29,179.62 = 15,162.12/x
  3. Step 3: Cross multiply
    21,135.24x = 29,179.62 × 15,162.12
  4. Step 4: Simplify right side
    21,135.24x = 442,424,899.99
  5. Step 5: Solve for x
    x = 442,424,899.99/21,135.24
  6. Step 6: Final answer
    x = 20,933.04

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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.