Home / 31,451.22-43,420.60-20,855.18

Finding the Fourth Proportional to 31,451.22, 43,420.60 and 20,855.18

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Solution

The fourth proportional to 31,451.22, 43,420.60 and 20,855.18 is: 28,792.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451.22 : 43,420.60 = 20,855.18 : x
  2. Step 2: Convert to fraction form
    31,451.22/43,420.60 = 20,855.18/x
  3. Step 3: Cross multiply
    31,451.22x = 43,420.60 × 20,855.18
  4. Step 4: Simplify right side
    31,451.22x = 905,544,428.71
  5. Step 5: Solve for x
    x = 905,544,428.71/31,451.22
  6. Step 6: Final answer
    x = 28,792.03

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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.