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Finding the Fourth Proportional to 29,615.78, 40,869.84 and 16,187.20

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Solution

The fourth proportional to 29,615.78, 40,869.84 and 16,187.20 is: 22,338.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,615.78 : 40,869.84 = 16,187.20 : x
  2. Step 2: Convert to fraction form
    29,615.78/40,869.84 = 16,187.20/x
  3. Step 3: Cross multiply
    29,615.78x = 40,869.84 × 16,187.20
  4. Step 4: Simplify right side
    29,615.78x = 661,568,274.05
  5. Step 5: Solve for x
    x = 661,568,274.05/29,615.78
  6. Step 6: Final answer
    x = 22,338.37

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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.