Home / 20,657.97-31,018.55-18,213.39

Finding the Fourth Proportional to 20,657.97, 31,018.55 and 18,213.39

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Solution

The fourth proportional to 20,657.97, 31,018.55 and 18,213.39 is: 27,347.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.97 : 31,018.55 = 18,213.39 : x
  2. Step 2: Convert to fraction form
    20,657.97/31,018.55 = 18,213.39/x
  3. Step 3: Cross multiply
    20,657.97x = 31,018.55 × 18,213.39
  4. Step 4: Simplify right side
    20,657.97x = 564,952,857.32
  5. Step 5: Solve for x
    x = 564,952,857.32/20,657.97
  6. Step 6: Final answer
    x = 27,347.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.