Home / 31,465.80-43,416.81-20,126.61

Finding the Fourth Proportional to 31,465.80, 43,416.81 and 20,126.61

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Solution

The fourth proportional to 31,465.80, 43,416.81 and 20,126.61 is: 27,770.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,465.80 : 43,416.81 = 20,126.61 : x
  2. Step 2: Convert to fraction form
    31,465.80/43,416.81 = 20,126.61/x
  3. Step 3: Cross multiply
    31,465.80x = 43,416.81 × 20,126.61
  4. Step 4: Simplify right side
    31,465.80x = 873,833,202.31
  5. Step 5: Solve for x
    x = 873,833,202.31/31,465.80
  6. Step 6: Final answer
    x = 27,770.89

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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.