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Finding the Fourth Proportional to 7,911.52, 10,917.92 and 4,767.76

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Solution

The fourth proportional to 7,911.52, 10,917.92 and 4,767.76 is: 6,579.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.52 : 10,917.92 = 4,767.76 : x
  2. Step 2: Convert to fraction form
    7,911.52/10,917.92 = 4,767.76/x
  3. Step 3: Cross multiply
    7,911.52x = 10,917.92 × 4,767.76
  4. Step 4: Simplify right side
    7,911.52x = 52,054,022.26
  5. Step 5: Solve for x
    x = 52,054,022.26/7,911.52
  6. Step 6: Final answer
    x = 6,579.52

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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.