Home / 20,409.74-30,611.11-5,615.38

Finding the Fourth Proportional to 20,409.74, 30,611.11 and 5,615.38

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Solution

The fourth proportional to 20,409.74, 30,611.11 and 5,615.38 is: 8,422.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.74 : 30,611.11 = 5,615.38 : x
  2. Step 2: Convert to fraction form
    20,409.74/30,611.11 = 5,615.38/x
  3. Step 3: Cross multiply
    20,409.74x = 30,611.11 × 5,615.38
  4. Step 4: Simplify right side
    20,409.74x = 171,893,014.87
  5. Step 5: Solve for x
    x = 171,893,014.87/20,409.74
  6. Step 6: Final answer
    x = 8,422.11

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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.