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Finding the Fourth Proportional to 13,703.56, 18,891.14 and 8,979.64

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Solution

The fourth proportional to 13,703.56, 18,891.14 and 8,979.64 is: 12,378.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.56 : 18,891.14 = 8,979.64 : x
  2. Step 2: Convert to fraction form
    13,703.56/18,891.14 = 8,979.64/x
  3. Step 3: Cross multiply
    13,703.56x = 18,891.14 × 8,979.64
  4. Step 4: Simplify right side
    13,703.56x = 169,635,636.39
  5. Step 5: Solve for x
    x = 169,635,636.39/13,703.56
  6. Step 6: Final answer
    x = 12,378.95

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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.