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Finding the Fourth Proportional to 8,640.05, 12,939.96 and 8,403.50

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Solution

The fourth proportional to 8,640.05, 12,939.96 and 8,403.50 is: 12,585.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.05 : 12,939.96 = 8,403.50 : x
  2. Step 2: Convert to fraction form
    8,640.05/12,939.96 = 8,403.50/x
  3. Step 3: Cross multiply
    8,640.05x = 12,939.96 × 8,403.50
  4. Step 4: Simplify right side
    8,640.05x = 108,740,994.09
  5. Step 5: Solve for x
    x = 108,740,994.09/8,640.05
  6. Step 6: Final answer
    x = 12,585.69

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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.