Home / 13,723.38-18,935.64-8,688.42

Finding the Fourth Proportional to 13,723.38, 18,935.64 and 8,688.42

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Solution

The fourth proportional to 13,723.38, 18,935.64 and 8,688.42 is: 11,988.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.38 : 18,935.64 = 8,688.42 : x
  2. Step 2: Convert to fraction form
    13,723.38/18,935.64 = 8,688.42/x
  3. Step 3: Cross multiply
    13,723.38x = 18,935.64 × 8,688.42
  4. Step 4: Simplify right side
    13,723.38x = 164,520,793.29
  5. Step 5: Solve for x
    x = 164,520,793.29/13,723.38
  6. Step 6: Final answer
    x = 11,988.36

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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.