Home / 21,129.26-29,158.79-12,175.25

Finding the Fourth Proportional to 21,129.26, 29,158.79 and 12,175.25

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Solution

The fourth proportional to 21,129.26, 29,158.79 and 12,175.25 is: 16,802.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.26 : 29,158.79 = 12,175.25 : x
  2. Step 2: Convert to fraction form
    21,129.26/29,158.79 = 12,175.25/x
  3. Step 3: Cross multiply
    21,129.26x = 29,158.79 × 12,175.25
  4. Step 4: Simplify right side
    21,129.26x = 355,015,351.28
  5. Step 5: Solve for x
    x = 355,015,351.28/21,129.26
  6. Step 6: Final answer
    x = 16,802.08

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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.