Home / 12,638.70-18,921.33-7,357.60

Finding the Fourth Proportional to 12,638.70, 18,921.33 and 7,357.60

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Solution

The fourth proportional to 12,638.70, 18,921.33 and 7,357.60 is: 11,015.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.70 : 18,921.33 = 7,357.60 : x
  2. Step 2: Convert to fraction form
    12,638.70/18,921.33 = 7,357.60/x
  3. Step 3: Cross multiply
    12,638.70x = 18,921.33 × 7,357.60
  4. Step 4: Simplify right side
    12,638.70x = 139,215,601.26
  5. Step 5: Solve for x
    x = 139,215,601.26/12,638.70
  6. Step 6: Final answer
    x = 11,015.03

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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.