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Finding the Fourth Proportional to 50,620.41, 75,918.15 and 21,009.87

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Solution

The fourth proportional to 50,620.41, 75,918.15 and 21,009.87 is: 31,509.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,620.41 : 75,918.15 = 21,009.87 : x
  2. Step 2: Convert to fraction form
    50,620.41/75,918.15 = 21,009.87/x
  3. Step 3: Cross multiply
    50,620.41x = 75,918.15 × 21,009.87
  4. Step 4: Simplify right side
    50,620.41x = 1,595,030,462.14
  5. Step 5: Solve for x
    x = 1,595,030,462.14/50,620.41
  6. Step 6: Final answer
    x = 31,509.63

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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.