Home / 21,629.88-29,851.34-13,130.06

Finding the Fourth Proportional to 21,629.88, 29,851.34 and 13,130.06

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Solution

The fourth proportional to 21,629.88, 29,851.34 and 13,130.06 is: 18,120.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,629.88 : 29,851.34 = 13,130.06 : x
  2. Step 2: Convert to fraction form
    21,629.88/29,851.34 = 13,130.06/x
  3. Step 3: Cross multiply
    21,629.88x = 29,851.34 × 13,130.06
  4. Step 4: Simplify right side
    21,629.88x = 391,949,670.37
  5. Step 5: Solve for x
    x = 391,949,670.37/21,629.88
  6. Step 6: Final answer
    x = 18,120.75

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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.