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Finding the Fourth Proportional to 20,159.51, 30,251.41 and 7,021.10

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Solution

The fourth proportional to 20,159.51, 30,251.41 and 7,021.10 is: 10,535.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.51 : 30,251.41 = 7,021.10 : x
  2. Step 2: Convert to fraction form
    20,159.51/30,251.41 = 7,021.10/x
  3. Step 3: Cross multiply
    20,159.51x = 30,251.41 × 7,021.10
  4. Step 4: Simplify right side
    20,159.51x = 212,398,232.83
  5. Step 5: Solve for x
    x = 212,398,232.83/20,159.51
  6. Step 6: Final answer
    x = 10,535.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.