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Finding the Fourth Proportional to 20,295.47, 30,444.12 and 7,811.03

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Solution

The fourth proportional to 20,295.47, 30,444.12 and 7,811.03 is: 11,716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.47 : 30,444.12 = 7,811.03 : x
  2. Step 2: Convert to fraction form
    20,295.47/30,444.12 = 7,811.03/x
  3. Step 3: Cross multiply
    20,295.47x = 30,444.12 × 7,811.03
  4. Step 4: Simplify right side
    20,295.47x = 237,799,934.64
  5. Step 5: Solve for x
    x = 237,799,934.64/20,295.47
  6. Step 6: Final answer
    x = 11,716.90

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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.