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Finding the Fourth Proportional to 29,011.38, 40,021.47 and 18,935.16

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Solution

The fourth proportional to 29,011.38, 40,021.47 and 18,935.16 is: 26,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,011.38 : 40,021.47 = 18,935.16 : x
  2. Step 2: Convert to fraction form
    29,011.38/40,021.47 = 18,935.16/x
  3. Step 3: Cross multiply
    29,011.38x = 40,021.47 × 18,935.16
  4. Step 4: Simplify right side
    29,011.38x = 757,812,937.89
  5. Step 5: Solve for x
    x = 757,812,937.89/29,011.38
  6. Step 6: Final answer
    x = 26,121.23

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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.