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Finding the Fourth Proportional to 20,630.99, 30,951.03 and 7,484.39

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Solution

The fourth proportional to 20,630.99, 30,951.03 and 7,484.39 is: 11,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.99 : 30,951.03 = 7,484.39 : x
  2. Step 2: Convert to fraction form
    20,630.99/30,951.03 = 7,484.39/x
  3. Step 3: Cross multiply
    20,630.99x = 30,951.03 × 7,484.39
  4. Step 4: Simplify right side
    20,630.99x = 231,649,424.67
  5. Step 5: Solve for x
    x = 231,649,424.67/20,630.99
  6. Step 6: Final answer
    x = 11,228.23

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1.5x scale

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.