Home / 21,629.88-29,851.32-13,130.04

Finding the Fourth Proportional to 21,629.88, 29,851.32 and 13,130.04

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Solution

The fourth proportional to 21,629.88, 29,851.32 and 13,130.04 is: 18,120.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,629.88 : 29,851.32 = 13,130.04 : x
  2. Step 2: Convert to fraction form
    21,629.88/29,851.32 = 13,130.04/x
  3. Step 3: Cross multiply
    21,629.88x = 29,851.32 × 13,130.04
  4. Step 4: Simplify right side
    21,629.88x = 391,949,025.65
  5. Step 5: Solve for x
    x = 391,949,025.65/21,629.88
  6. Step 6: Final answer
    x = 18,120.72

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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.