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Finding the Fourth Proportional to 10,712.64, 16,066.80 and 2,920.80

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Solution

The fourth proportional to 10,712.64, 16,066.80 and 2,920.80 is: 4,380.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,712.64 : 16,066.80 = 2,920.80 : x
  2. Step 2: Convert to fraction form
    10,712.64/16,066.80 = 2,920.80/x
  3. Step 3: Cross multiply
    10,712.64x = 16,066.80 × 2,920.80
  4. Step 4: Simplify right side
    10,712.64x = 46,927,909.44
  5. Step 5: Solve for x
    x = 46,927,909.44/10,712.64
  6. Step 6: Final answer
    x = 4,380.61

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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.