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Finding the Fourth Proportional to 28,336.80, 42,506.72 and 8,613.86

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Solution

The fourth proportional to 28,336.80, 42,506.72 and 8,613.86 is: 12,921.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.80 : 42,506.72 = 8,613.86 : x
  2. Step 2: Convert to fraction form
    28,336.80/42,506.72 = 8,613.86/x
  3. Step 3: Cross multiply
    28,336.80x = 42,506.72 × 8,613.86
  4. Step 4: Simplify right side
    28,336.80x = 366,146,679.54
  5. Step 5: Solve for x
    x = 366,146,679.54/28,336.80
  6. Step 6: Final answer
    x = 12,921.24

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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.