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Finding the Fourth Proportional to 7,894.80, 10,893.24 and 4,911.12

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Solution

The fourth proportional to 7,894.80, 10,893.24 and 4,911.12 is: 6,776.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.80 : 10,893.24 = 4,911.12 : x
  2. Step 2: Convert to fraction form
    7,894.80/10,893.24 = 4,911.12/x
  3. Step 3: Cross multiply
    7,894.80x = 10,893.24 × 4,911.12
  4. Step 4: Simplify right side
    7,894.80x = 53,498,008.83
  5. Step 5: Solve for x
    x = 53,498,008.83/7,894.80
  6. Step 6: Final answer
    x = 6,776.36

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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.