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Finding the Fourth Proportional to 7,709.19, 10,629.07 and 6,434.92

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Solution

The fourth proportional to 7,709.19, 10,629.07 and 6,434.92 is: 8,872.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,709.19 : 10,629.07 = 6,434.92 : x
  2. Step 2: Convert to fraction form
    7,709.19/10,629.07 = 6,434.92/x
  3. Step 3: Cross multiply
    7,709.19x = 10,629.07 × 6,434.92
  4. Step 4: Simplify right side
    7,709.19x = 68,397,215.12
  5. Step 5: Solve for x
    x = 68,397,215.12/7,709.19
  6. Step 6: Final answer
    x = 8,872.17

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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.