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Finding the Fourth Proportional to 7,063.56, 9,747.78 and 3,920.04

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Solution

The fourth proportional to 7,063.56, 9,747.78 and 3,920.04 is: 5,409.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,063.56 : 9,747.78 = 3,920.04 : x
  2. Step 2: Convert to fraction form
    7,063.56/9,747.78 = 3,920.04/x
  3. Step 3: Cross multiply
    7,063.56x = 9,747.78 × 3,920.04
  4. Step 4: Simplify right side
    7,063.56x = 38,211,687.51
  5. Step 5: Solve for x
    x = 38,211,687.51/7,063.56
  6. Step 6: Final answer
    x = 5,409.69

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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.