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Finding the Fourth Proportional to 7,891.98, 11,829.61 and 3,445.74

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Solution

The fourth proportional to 7,891.98, 11,829.61 and 3,445.74 is: 5,164.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.98 : 11,829.61 = 3,445.74 : x
  2. Step 2: Convert to fraction form
    7,891.98/11,829.61 = 3,445.74/x
  3. Step 3: Cross multiply
    7,891.98x = 11,829.61 × 3,445.74
  4. Step 4: Simplify right side
    7,891.98x = 40,761,760.36
  5. Step 5: Solve for x
    x = 40,761,760.36/7,891.98
  6. Step 6: Final answer
    x = 5,164.96

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1.5x scale

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.