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Finding the Fourth Proportional to 7,857.56, 10,843.74 and 4,320.70

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Solution

The fourth proportional to 7,857.56, 10,843.74 and 4,320.70 is: 5,962.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.56 : 10,843.74 = 4,320.70 : x
  2. Step 2: Convert to fraction form
    7,857.56/10,843.74 = 4,320.70/x
  3. Step 3: Cross multiply
    7,857.56x = 10,843.74 × 4,320.70
  4. Step 4: Simplify right side
    7,857.56x = 46,852,520.31
  5. Step 5: Solve for x
    x = 46,852,520.31/7,857.56
  6. Step 6: Final answer
    x = 5,962.73

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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.