Home / 13,121.42-19,679.36-4,237.56

Finding the Fourth Proportional to 13,121.42, 19,679.36 and 4,237.56

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Solution

The fourth proportional to 13,121.42, 19,679.36 and 4,237.56 is: 6,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.42 : 19,679.36 = 4,237.56 : x
  2. Step 2: Convert to fraction form
    13,121.42/19,679.36 = 4,237.56/x
  3. Step 3: Cross multiply
    13,121.42x = 19,679.36 × 4,237.56
  4. Step 4: Simplify right side
    13,121.42x = 83,392,447.57
  5. Step 5: Solve for x
    x = 83,392,447.57/13,121.42
  6. Step 6: Final answer
    x = 6,355.45

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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.