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Finding the Fourth Proportional to 20,625.36, 30,931.02 and 7,474.74

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Solution

The fourth proportional to 20,625.36, 30,931.02 and 7,474.74 is: 11,209.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.36 : 30,931.02 = 7,474.74 : x
  2. Step 2: Convert to fraction form
    20,625.36/30,931.02 = 7,474.74/x
  3. Step 3: Cross multiply
    20,625.36x = 30,931.02 × 7,474.74
  4. Step 4: Simplify right side
    20,625.36x = 231,201,332.43
  5. Step 5: Solve for x
    x = 231,201,332.43/20,625.36
  6. Step 6: Final answer
    x = 11,209.57

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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.