Home / 31,705.86-47,524.47-20,620.51

Finding the Fourth Proportional to 31,705.86, 47,524.47 and 20,620.51

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Solution

The fourth proportional to 31,705.86, 47,524.47 and 20,620.51 is: 30,908.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,705.86 : 47,524.47 = 20,620.51 : x
  2. Step 2: Convert to fraction form
    31,705.86/47,524.47 = 20,620.51/x
  3. Step 3: Cross multiply
    31,705.86x = 47,524.47 × 20,620.51
  4. Step 4: Simplify right side
    31,705.86x = 979,978,808.88
  5. Step 5: Solve for x
    x = 979,978,808.88/31,705.86
  6. Step 6: Final answer
    x = 30,908.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.