Home / 21,287.46-29,163.98-20,489.39

Finding the Fourth Proportional to 21,287.46, 29,163.98 and 20,489.39

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Solution

The fourth proportional to 21,287.46, 29,163.98 and 20,489.39 is: 28,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.46 : 29,163.98 = 20,489.39 : x
  2. Step 2: Convert to fraction form
    21,287.46/29,163.98 = 20,489.39/x
  3. Step 3: Cross multiply
    21,287.46x = 29,163.98 × 20,489.39
  4. Step 4: Simplify right side
    21,287.46x = 597,552,160.17
  5. Step 5: Solve for x
    x = 597,552,160.17/21,287.46
  6. Step 6: Final answer
    x = 28,070.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.