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Finding the Fourth Proportional to 20,654.68, 30,981.66 and 6,803.80

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Solution

The fourth proportional to 20,654.68, 30,981.66 and 6,803.80 is: 10,205.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.68 : 30,981.66 = 6,803.80 : x
  2. Step 2: Convert to fraction form
    20,654.68/30,981.66 = 6,803.80/x
  3. Step 3: Cross multiply
    20,654.68x = 30,981.66 × 6,803.80
  4. Step 4: Simplify right side
    20,654.68x = 210,793,018.31
  5. Step 5: Solve for x
    x = 210,793,018.31/20,654.68
  6. Step 6: Final answer
    x = 10,205.58

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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.