Home / 12,491.10-18,739.20-4,173.72

Finding the Fourth Proportional to 12,491.10, 18,739.20 and 4,173.72

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Solution

The fourth proportional to 12,491.10, 18,739.20 and 4,173.72 is: 6,261.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.10 : 18,739.20 = 4,173.72 : x
  2. Step 2: Convert to fraction form
    12,491.10/18,739.20 = 4,173.72/x
  3. Step 3: Cross multiply
    12,491.10x = 18,739.20 × 4,173.72
  4. Step 4: Simplify right side
    12,491.10x = 78,212,173.82
  5. Step 5: Solve for x
    x = 78,212,173.82/12,491.10
  6. Step 6: Final answer
    x = 6,261.43

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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.