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Finding the Fourth Proportional to 4,842.92, 6,686.34 and 2,981

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Solution

The fourth proportional to 4,842.92, 6,686.34 and 2,981 is: 4,115.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,842.92 : 6,686.34 = 2,981 : x
  2. Step 2: Convert to fraction form
    4,842.92/6,686.34 = 2,981/x
  3. Step 3: Cross multiply
    4,842.92x = 6,686.34 × 2,981
  4. Step 4: Simplify right side
    4,842.92x = 19,931,979.54
  5. Step 5: Solve for x
    x = 19,931,979.54/4,842.92
  6. Step 6: Final answer
    x = 4,115.69

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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.