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Finding the Fourth Proportional to 6,891.76, 9,515.19 and 5,295.58

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Solution

The fourth proportional to 6,891.76, 9,515.19 and 5,295.58 is: 7,311.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.76 : 9,515.19 = 5,295.58 : x
  2. Step 2: Convert to fraction form
    6,891.76/9,515.19 = 5,295.58/x
  3. Step 3: Cross multiply
    6,891.76x = 9,515.19 × 5,295.58
  4. Step 4: Simplify right side
    6,891.76x = 50,388,449.86
  5. Step 5: Solve for x
    x = 50,388,449.86/6,891.76
  6. Step 6: Final answer
    x = 7,311.41

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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.