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Finding the Fourth Proportional to 7,063.68, 9,747.72 and 3,920.16

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Solution

The fourth proportional to 7,063.68, 9,747.72 and 3,920.16 is: 5,409.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,063.68 : 9,747.72 = 3,920.16 : x
  2. Step 2: Convert to fraction form
    7,063.68/9,747.72 = 3,920.16/x
  3. Step 3: Cross multiply
    7,063.68x = 9,747.72 × 3,920.16
  4. Step 4: Simplify right side
    7,063.68x = 38,212,622.04
  5. Step 5: Solve for x
    x = 38,212,622.04/7,063.68
  6. Step 6: Final answer
    x = 5,409.73

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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.