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Finding the Fourth Proportional to 31,212.80, 43,073.72 and 17,065.68

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Solution

The fourth proportional to 31,212.80, 43,073.72 and 17,065.68 is: 23,550.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,212.80 : 43,073.72 = 17,065.68 : x
  2. Step 2: Convert to fraction form
    31,212.80/43,073.72 = 17,065.68/x
  3. Step 3: Cross multiply
    31,212.80x = 43,073.72 × 17,065.68
  4. Step 4: Simplify right side
    31,212.80x = 735,082,321.93
  5. Step 5: Solve for x
    x = 735,082,321.93/31,212.80
  6. Step 6: Final answer
    x = 23,550.67

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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.