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Finding the Fourth Proportional to 20,478.68, 30,717.66 and 6,627.68

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Solution

The fourth proportional to 20,478.68, 30,717.66 and 6,627.68 is: 9,941.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.68 : 30,717.66 = 6,627.68 : x
  2. Step 2: Convert to fraction form
    20,478.68/30,717.66 = 6,627.68/x
  3. Step 3: Cross multiply
    20,478.68x = 30,717.66 × 6,627.68
  4. Step 4: Simplify right side
    20,478.68x = 203,586,820.83
  5. Step 5: Solve for x
    x = 203,586,820.83/20,478.68
  6. Step 6: Final answer
    x = 9,941.40

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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.