Home / 13,603.92-20,388.60-7,763.76

Finding the Fourth Proportional to 13,603.92, 20,388.60 and 7,763.76

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Solution

The fourth proportional to 13,603.92, 20,388.60 and 7,763.76 is: 11,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.92 : 20,388.60 = 7,763.76 : x
  2. Step 2: Convert to fraction form
    13,603.92/20,388.60 = 7,763.76/x
  3. Step 3: Cross multiply
    13,603.92x = 20,388.60 × 7,763.76
  4. Step 4: Simplify right side
    13,603.92x = 158,292,197.14
  5. Step 5: Solve for x
    x = 158,292,197.14/13,603.92
  6. Step 6: Final answer
    x = 11,635.78

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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.