Home / 31,755.83-43,802.91-20,405.79

Finding the Fourth Proportional to 31,755.83, 43,802.91 and 20,405.79

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Solution

The fourth proportional to 31,755.83, 43,802.91 and 20,405.79 is: 28,147.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,755.83 : 43,802.91 = 20,405.79 : x
  2. Step 2: Convert to fraction form
    31,755.83/43,802.91 = 20,405.79/x
  3. Step 3: Cross multiply
    31,755.83x = 43,802.91 × 20,405.79
  4. Step 4: Simplify right side
    31,755.83x = 893,832,982.85
  5. Step 5: Solve for x
    x = 893,832,982.85/31,755.83
  6. Step 6: Final answer
    x = 28,147.06

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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.