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Finding the Fourth Proportional to 8,470.79, 12,703.85 and 3,539.61

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Solution

The fourth proportional to 8,470.79, 12,703.85 and 3,539.61 is: 5,308.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,470.79 : 12,703.85 = 3,539.61 : x
  2. Step 2: Convert to fraction form
    8,470.79/12,703.85 = 3,539.61/x
  3. Step 3: Cross multiply
    8,470.79x = 12,703.85 × 3,539.61
  4. Step 4: Simplify right side
    8,470.79x = 44,966,656.80
  5. Step 5: Solve for x
    x = 44,966,656.80/8,470.79
  6. Step 6: Final answer
    x = 5,308.44

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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.