Home / 13,611.87-20,398.80-7,358.40

Finding the Fourth Proportional to 13,611.87, 20,398.80 and 7,358.40

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Solution

The fourth proportional to 13,611.87, 20,398.80 and 7,358.40 is: 11,027.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.87 : 20,398.80 = 7,358.40 : x
  2. Step 2: Convert to fraction form
    13,611.87/20,398.80 = 7,358.40/x
  3. Step 3: Cross multiply
    13,611.87x = 20,398.80 × 7,358.40
  4. Step 4: Simplify right side
    13,611.87x = 150,102,529.92
  5. Step 5: Solve for x
    x = 150,102,529.92/13,611.87
  6. Step 6: Final answer
    x = 11,027.33

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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.