Home / 31,686.78-47,523.44-20,408.34

Finding the Fourth Proportional to 31,686.78, 47,523.44 and 20,408.34

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Solution

The fourth proportional to 31,686.78, 47,523.44 and 20,408.34 is: 30,608.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.78 : 47,523.44 = 20,408.34 : x
  2. Step 2: Convert to fraction form
    31,686.78/47,523.44 = 20,408.34/x
  3. Step 3: Cross multiply
    31,686.78x = 47,523.44 × 20,408.34
  4. Step 4: Simplify right side
    31,686.78x = 969,874,521.49
  5. Step 5: Solve for x
    x = 969,874,521.49/31,686.78
  6. Step 6: Final answer
    x = 30,608.18

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1.5x scale

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.