Home / 13,753.08-18,979.11-7,784.64

Finding the Fourth Proportional to 13,753.08, 18,979.11 and 7,784.64

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Solution

The fourth proportional to 13,753.08, 18,979.11 and 7,784.64 is: 10,742.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.08 : 18,979.11 = 7,784.64 : x
  2. Step 2: Convert to fraction form
    13,753.08/18,979.11 = 7,784.64/x
  3. Step 3: Cross multiply
    13,753.08x = 18,979.11 × 7,784.64
  4. Step 4: Simplify right side
    13,753.08x = 147,745,538.87
  5. Step 5: Solve for x
    x = 147,745,538.87/13,753.08
  6. Step 6: Final answer
    x = 10,742.72

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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.