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Finding the Fourth Proportional to 20,187.50, 30,281.52 and 6,336.50

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Solution

The fourth proportional to 20,187.50, 30,281.52 and 6,336.50 is: 9,504.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.50 : 30,281.52 = 6,336.50 : x
  2. Step 2: Convert to fraction form
    20,187.50/30,281.52 = 6,336.50/x
  3. Step 3: Cross multiply
    20,187.50x = 30,281.52 × 6,336.50
  4. Step 4: Simplify right side
    20,187.50x = 191,878,851.48
  5. Step 5: Solve for x
    x = 191,878,851.48/20,187.50
  6. Step 6: Final answer
    x = 9,504.83

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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.