Home / 31,555.76-43,540.90-18,981.32

Finding the Fourth Proportional to 31,555.76, 43,540.90 and 18,981.32

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Solution

The fourth proportional to 31,555.76, 43,540.90 and 18,981.32 is: 26,190.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,555.76 : 43,540.90 = 18,981.32 : x
  2. Step 2: Convert to fraction form
    31,555.76/43,540.90 = 18,981.32/x
  3. Step 3: Cross multiply
    31,555.76x = 43,540.90 × 18,981.32
  4. Step 4: Simplify right side
    31,555.76x = 826,463,755.99
  5. Step 5: Solve for x
    x = 826,463,755.99/31,555.76
  6. Step 6: Final answer
    x = 26,190.58

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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.