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Finding the Fourth Proportional to 7,898.08, 10,900.20 and 5,905.20

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Solution

The fourth proportional to 7,898.08, 10,900.20 and 5,905.20 is: 8,149.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,898.08 : 10,900.20 = 5,905.20 : x
  2. Step 2: Convert to fraction form
    7,898.08/10,900.20 = 5,905.20/x
  3. Step 3: Cross multiply
    7,898.08x = 10,900.20 × 5,905.20
  4. Step 4: Simplify right side
    7,898.08x = 64,367,861.04
  5. Step 5: Solve for x
    x = 64,367,861.04/7,898.08
  6. Step 6: Final answer
    x = 8,149.81

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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.