Home / 13,723.89-18,936.40-8,684.59

Finding the Fourth Proportional to 13,723.89, 18,936.40 and 8,684.59

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Solution

The fourth proportional to 13,723.89, 18,936.40 and 8,684.59 is: 11,983.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.89 : 18,936.40 = 8,684.59 : x
  2. Step 2: Convert to fraction form
    13,723.89/18,936.40 = 8,684.59/x
  3. Step 3: Cross multiply
    13,723.89x = 18,936.40 × 8,684.59
  4. Step 4: Simplify right side
    13,723.89x = 164,454,870.08
  5. Step 5: Solve for x
    x = 164,454,870.08/13,723.89
  6. Step 6: Final answer
    x = 11,983.11

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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.