Home / 20,163.15-27,820.83-13,705.02

Finding the Fourth Proportional to 20,163.15, 27,820.83 and 13,705.02

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Solution

The fourth proportional to 20,163.15, 27,820.83 and 13,705.02 is: 18,909.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.15 : 27,820.83 = 13,705.02 : x
  2. Step 2: Convert to fraction form
    20,163.15/27,820.83 = 13,705.02/x
  3. Step 3: Cross multiply
    20,163.15x = 27,820.83 × 13,705.02
  4. Step 4: Simplify right side
    20,163.15x = 381,285,031.57
  5. Step 5: Solve for x
    x = 381,285,031.57/20,163.15
  6. Step 6: Final answer
    x = 18,909.99

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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.