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Finding the Fourth Proportional to 29,066.51, 40,121.90 and 17,129.09

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Solution

The fourth proportional to 29,066.51, 40,121.90 and 17,129.09 is: 23,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,066.51 : 40,121.90 = 17,129.09 : x
  2. Step 2: Convert to fraction form
    29,066.51/40,121.90 = 17,129.09/x
  3. Step 3: Cross multiply
    29,066.51x = 40,121.90 × 17,129.09
  4. Step 4: Simplify right side
    29,066.51x = 687,251,478.28
  5. Step 5: Solve for x
    x = 687,251,478.28/29,066.51
  6. Step 6: Final answer
    x = 23,644.10

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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.