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Finding the Fourth Proportional to 7,709.74, 10,639.22 and 4,352.86

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Solution

The fourth proportional to 7,709.74, 10,639.22 and 4,352.86 is: 6,006.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,709.74 : 10,639.22 = 4,352.86 : x
  2. Step 2: Convert to fraction form
    7,709.74/10,639.22 = 4,352.86/x
  3. Step 3: Cross multiply
    7,709.74x = 10,639.22 × 4,352.86
  4. Step 4: Simplify right side
    7,709.74x = 46,311,035.17
  5. Step 5: Solve for x
    x = 46,311,035.17/7,709.74
  6. Step 6: Final answer
    x = 6,006.82

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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.