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Finding the Fourth Proportional to 7,898.39, 10,899.80 and 4,361.61

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Solution

The fourth proportional to 7,898.39, 10,899.80 and 4,361.61 is: 6,019.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,898.39 : 10,899.80 = 4,361.61 : x
  2. Step 2: Convert to fraction form
    7,898.39/10,899.80 = 4,361.61/x
  3. Step 3: Cross multiply
    7,898.39x = 10,899.80 × 4,361.61
  4. Step 4: Simplify right side
    7,898.39x = 47,540,654.87
  5. Step 5: Solve for x
    x = 47,540,654.87/7,898.39
  6. Step 6: Final answer
    x = 6,019.03

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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.