Home / 31,408.20-47,015.10-18,221.40

Finding the Fourth Proportional to 31,408.20, 47,015.10 and 18,221.40

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Solution

The fourth proportional to 31,408.20, 47,015.10 and 18,221.40 is: 27,275.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,408.20 : 47,015.10 = 18,221.40 : x
  2. Step 2: Convert to fraction form
    31,408.20/47,015.10 = 18,221.40/x
  3. Step 3: Cross multiply
    31,408.20x = 47,015.10 × 18,221.40
  4. Step 4: Simplify right side
    31,408.20x = 856,680,943.14
  5. Step 5: Solve for x
    x = 856,680,943.14/31,408.20
  6. Step 6: Final answer
    x = 27,275.71

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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.