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Finding the Fourth Proportional to 20,650.28, 30,987.77 and 7,503.71

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Solution

The fourth proportional to 20,650.28, 30,987.77 and 7,503.71 is: 11,260.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.28 : 30,987.77 = 7,503.71 : x
  2. Step 2: Convert to fraction form
    20,650.28/30,987.77 = 7,503.71/x
  3. Step 3: Cross multiply
    20,650.28x = 30,987.77 × 7,503.71
  4. Step 4: Simplify right side
    20,650.28x = 232,523,047.17
  5. Step 5: Solve for x
    x = 232,523,047.17/20,650.28
  6. Step 6: Final answer
    x = 11,260.05

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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.