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Finding the Fourth Proportional to 20,335.20, 30,510.96 and 8,648.16

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Solution

The fourth proportional to 20,335.20, 30,510.96 and 8,648.16 is: 12,975.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.20 : 30,510.96 = 8,648.16 : x
  2. Step 2: Convert to fraction form
    20,335.20/30,510.96 = 8,648.16/x
  3. Step 3: Cross multiply
    20,335.20x = 30,510.96 × 8,648.16
  4. Step 4: Simplify right side
    20,335.20x = 263,863,663.83
  5. Step 5: Solve for x
    x = 263,863,663.83/20,335.20
  6. Step 6: Final answer
    x = 12,975.71

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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.