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Finding the Fourth Proportional to 9,171.70, 12,656.95 and 4,979.95

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Solution

The fourth proportional to 9,171.70, 12,656.95 and 4,979.95 is: 6,872.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,171.70 : 12,656.95 = 4,979.95 : x
  2. Step 2: Convert to fraction form
    9,171.70/12,656.95 = 4,979.95/x
  3. Step 3: Cross multiply
    9,171.70x = 12,656.95 × 4,979.95
  4. Step 4: Simplify right side
    9,171.70x = 63,030,934.06
  5. Step 5: Solve for x
    x = 63,030,934.06/9,171.70
  6. Step 6: Final answer
    x = 6,872.33

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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.