Home / 13,731.15-18,949.28-8,422.83

Finding the Fourth Proportional to 13,731.15, 18,949.28 and 8,422.83

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Solution

The fourth proportional to 13,731.15, 18,949.28 and 8,422.83 is: 11,623.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.15 : 18,949.28 = 8,422.83 : x
  2. Step 2: Convert to fraction form
    13,731.15/18,949.28 = 8,422.83/x
  3. Step 3: Cross multiply
    13,731.15x = 18,949.28 × 8,422.83
  4. Step 4: Simplify right side
    13,731.15x = 159,606,564.06
  5. Step 5: Solve for x
    x = 159,606,564.06/13,731.15
  6. Step 6: Final answer
    x = 11,623.69

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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.