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Finding the Fourth Proportional to 7,073.76, 9,761.36 and 3,929.84

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Solution

The fourth proportional to 7,073.76, 9,761.36 and 3,929.84 is: 5,422.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,073.76 : 9,761.36 = 3,929.84 : x
  2. Step 2: Convert to fraction form
    7,073.76/9,761.36 = 3,929.84/x
  3. Step 3: Cross multiply
    7,073.76x = 9,761.36 × 3,929.84
  4. Step 4: Simplify right side
    7,073.76x = 38,360,582.98
  5. Step 5: Solve for x
    x = 38,360,582.98/7,073.76
  6. Step 6: Final answer
    x = 5,422.94

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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.