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Finding the Fourth Proportional to 7,919.60, 10,929.14 and 4,383.14

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Solution

The fourth proportional to 7,919.60, 10,929.14 and 4,383.14 is: 6,048.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.60 : 10,929.14 = 4,383.14 : x
  2. Step 2: Convert to fraction form
    7,919.60/10,929.14 = 4,383.14/x
  3. Step 3: Cross multiply
    7,919.60x = 10,929.14 × 4,383.14
  4. Step 4: Simplify right side
    7,919.60x = 47,903,874.14
  5. Step 5: Solve for x
    x = 47,903,874.14/7,919.60
  6. Step 6: Final answer
    x = 6,048.78

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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.