Home / 20,730.63-28,588.17-13,163.61

Finding the Fourth Proportional to 20,730.63, 28,588.17 and 13,163.61

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Solution

The fourth proportional to 20,730.63, 28,588.17 and 13,163.61 is: 18,153.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.63 : 28,588.17 = 13,163.61 : x
  2. Step 2: Convert to fraction form
    20,730.63/28,588.17 = 13,163.61/x
  3. Step 3: Cross multiply
    20,730.63x = 28,588.17 × 13,163.61
  4. Step 4: Simplify right side
    20,730.63x = 376,323,677.06
  5. Step 5: Solve for x
    x = 376,323,677.06/20,730.63
  6. Step 6: Final answer
    x = 18,153.02

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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.