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Finding the Fourth Proportional to 13,659.56, 18,833.28 and 8,935.64

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Solution

The fourth proportional to 13,659.56, 18,833.28 and 8,935.64 is: 12,320.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.56 : 18,833.28 = 8,935.64 : x
  2. Step 2: Convert to fraction form
    13,659.56/18,833.28 = 8,935.64/x
  3. Step 3: Cross multiply
    13,659.56x = 18,833.28 × 8,935.64
  4. Step 4: Simplify right side
    13,659.56x = 168,287,410.10
  5. Step 5: Solve for x
    x = 168,287,410.10/13,659.56
  6. Step 6: Final answer
    x = 12,320.12

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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.