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Finding the Fourth Proportional to 9,170.82, 12,655.74 and 4,979.07

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Solution

The fourth proportional to 9,170.82, 12,655.74 and 4,979.07 is: 6,871.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,170.82 : 12,655.74 = 4,979.07 : x
  2. Step 2: Convert to fraction form
    9,170.82/12,655.74 = 4,979.07/x
  3. Step 3: Cross multiply
    9,170.82x = 12,655.74 × 4,979.07
  4. Step 4: Simplify right side
    9,170.82x = 63,013,815.36
  5. Step 5: Solve for x
    x = 63,013,815.36/9,170.82
  6. Step 6: Final answer
    x = 6,871.12

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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.