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Finding the Fourth Proportional to 7,089.80, 10,639.79 and 5,719.68

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Solution

The fourth proportional to 7,089.80, 10,639.79 and 5,719.68 is: 8,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,089.80 : 10,639.79 = 5,719.68 : x
  2. Step 2: Convert to fraction form
    7,089.80/10,639.79 = 5,719.68/x
  3. Step 3: Cross multiply
    7,089.80x = 10,639.79 × 5,719.68
  4. Step 4: Simplify right side
    7,089.80x = 60,856,165.47
  5. Step 5: Solve for x
    x = 60,856,165.47/7,089.80
  6. Step 6: Final answer
    x = 8,583.63

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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.