Home / 21,127.10-29,157.39-12,629.25

Finding the Fourth Proportional to 21,127.10, 29,157.39 and 12,629.25

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Solution

The fourth proportional to 21,127.10, 29,157.39 and 12,629.25 is: 17,429.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.10 : 29,157.39 = 12,629.25 : x
  2. Step 2: Convert to fraction form
    21,127.10/29,157.39 = 12,629.25/x
  3. Step 3: Cross multiply
    21,127.10x = 29,157.39 × 12,629.25
  4. Step 4: Simplify right side
    21,127.10x = 368,235,967.66
  5. Step 5: Solve for x
    x = 368,235,967.66/21,127.10
  6. Step 6: Final answer
    x = 17,429.56

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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.