Home / 31,408.81-43,354.26-20,108.74

Finding the Fourth Proportional to 31,408.81, 43,354.26 and 20,108.74

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Solution

The fourth proportional to 31,408.81, 43,354.26 and 20,108.74 is: 27,756.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,408.81 : 43,354.26 = 20,108.74 : x
  2. Step 2: Convert to fraction form
    31,408.81/43,354.26 = 20,108.74/x
  3. Step 3: Cross multiply
    31,408.81x = 43,354.26 × 20,108.74
  4. Step 4: Simplify right side
    31,408.81x = 871,799,650.62
  5. Step 5: Solve for x
    x = 871,799,650.62/31,408.81
  6. Step 6: Final answer
    x = 27,756.53

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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.