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Finding the Fourth Proportional to 29,369.43, 40,530.12 and 15,940.80

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Solution

The fourth proportional to 29,369.43, 40,530.12 and 15,940.80 is: 21,998.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,369.43 : 40,530.12 = 15,940.80 : x
  2. Step 2: Convert to fraction form
    29,369.43/40,530.12 = 15,940.80/x
  3. Step 3: Cross multiply
    29,369.43x = 40,530.12 × 15,940.80
  4. Step 4: Simplify right side
    29,369.43x = 646,082,536.90
  5. Step 5: Solve for x
    x = 646,082,536.90/29,369.43
  6. Step 6: Final answer
    x = 21,998.47

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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.