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Finding the Fourth Proportional to 7,905.86, 10,910.20 and 4,369.20

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Solution

The fourth proportional to 7,905.86, 10,910.20 and 4,369.20 is: 6,029.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.86 : 10,910.20 = 4,369.20 : x
  2. Step 2: Convert to fraction form
    7,905.86/10,910.20 = 4,369.20/x
  3. Step 3: Cross multiply
    7,905.86x = 10,910.20 × 4,369.20
  4. Step 4: Simplify right side
    7,905.86x = 47,668,845.84
  5. Step 5: Solve for x
    x = 47,668,845.84/7,905.86
  6. Step 6: Final answer
    x = 6,029.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.