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Finding the Fourth Proportional to 7,957.62, 10,979.78 and 4,813.74

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Solution

The fourth proportional to 7,957.62, 10,979.78 and 4,813.74 is: 6,641.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.62 : 10,979.78 = 4,813.74 : x
  2. Step 2: Convert to fraction form
    7,957.62/10,979.78 = 4,813.74/x
  3. Step 3: Cross multiply
    7,957.62x = 10,979.78 × 4,813.74
  4. Step 4: Simplify right side
    7,957.62x = 52,853,782.11
  5. Step 5: Solve for x
    x = 52,853,782.11/7,957.62
  6. Step 6: Final answer
    x = 6,641.91

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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.