Home / 31,481.93-43,431.81-20,853.11

Finding the Fourth Proportional to 31,481.93, 43,431.81 and 20,853.11

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Solution

The fourth proportional to 31,481.93, 43,431.81 and 20,853.11 is: 28,768.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,481.93 : 43,431.81 = 20,853.11 : x
  2. Step 2: Convert to fraction form
    31,481.93/43,431.81 = 20,853.11/x
  3. Step 3: Cross multiply
    31,481.93x = 43,431.81 × 20,853.11
  4. Step 4: Simplify right side
    31,481.93x = 905,688,341.81
  5. Step 5: Solve for x
    x = 905,688,341.81/31,481.93
  6. Step 6: Final answer
    x = 28,768.51

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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.