Home / 31,717.11-43,749.81-20,401.35

Finding the Fourth Proportional to 31,717.11, 43,749.81 and 20,401.35

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Solution

The fourth proportional to 31,717.11, 43,749.81 and 20,401.35 is: 28,141.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,717.11 : 43,749.81 = 20,401.35 : x
  2. Step 2: Convert to fraction form
    31,717.11/43,749.81 = 20,401.35/x
  3. Step 3: Cross multiply
    31,717.11x = 43,749.81 × 20,401.35
  4. Step 4: Simplify right side
    31,717.11x = 892,555,186.24
  5. Step 5: Solve for x
    x = 892,555,186.24/31,717.11
  6. Step 6: Final answer
    x = 28,141.13

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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.