Home / 12,491.39-18,735.46-5,921.75

Finding the Fourth Proportional to 12,491.39, 18,735.46 and 5,921.75

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Solution

The fourth proportional to 12,491.39, 18,735.46 and 5,921.75 is: 8,881.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.39 : 18,735.46 = 5,921.75 : x
  2. Step 2: Convert to fraction form
    12,491.39/18,735.46 = 5,921.75/x
  3. Step 3: Cross multiply
    12,491.39x = 18,735.46 × 5,921.75
  4. Step 4: Simplify right side
    12,491.39x = 110,946,601.77
  5. Step 5: Solve for x
    x = 110,946,601.77/12,491.39
  6. Step 6: Final answer
    x = 8,881.85

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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.