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Finding the Fourth Proportional to 29,052.88, 40,078.13 and 18,987.21

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Solution

The fourth proportional to 29,052.88, 40,078.13 and 18,987.21 is: 26,192.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,052.88 : 40,078.13 = 18,987.21 : x
  2. Step 2: Convert to fraction form
    29,052.88/40,078.13 = 18,987.21/x
  3. Step 3: Cross multiply
    29,052.88x = 40,078.13 × 18,987.21
  4. Step 4: Simplify right side
    29,052.88x = 760,971,775.78
  5. Step 5: Solve for x
    x = 760,971,775.78/29,052.88
  6. Step 6: Final answer
    x = 26,192.65

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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.