Home / 31,408.20-47,112.30-12,940.20

Finding the Fourth Proportional to 31,408.20, 47,112.30 and 12,940.20

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Solution

The fourth proportional to 31,408.20, 47,112.30 and 12,940.20 is: 19,410.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,408.20 : 47,112.30 = 12,940.20 : x
  2. Step 2: Convert to fraction form
    31,408.20/47,112.30 = 12,940.20/x
  3. Step 3: Cross multiply
    31,408.20x = 47,112.30 × 12,940.20
  4. Step 4: Simplify right side
    31,408.20x = 609,642,584.46
  5. Step 5: Solve for x
    x = 609,642,584.46/31,408.20
  6. Step 6: Final answer
    x = 19,410.30

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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.