Home / 20,407.86-30,611.79-13,480.74

Finding the Fourth Proportional to 20,407.86, 30,611.79 and 13,480.74

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Solution

The fourth proportional to 20,407.86, 30,611.79 and 13,480.74 is: 20,221.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.86 : 30,611.79 = 13,480.74 : x
  2. Step 2: Convert to fraction form
    20,407.86/30,611.79 = 13,480.74/x
  3. Step 3: Cross multiply
    20,407.86x = 30,611.79 × 13,480.74
  4. Step 4: Simplify right side
    20,407.86x = 412,669,581.92
  5. Step 5: Solve for x
    x = 412,669,581.92/20,407.86
  6. Step 6: Final answer
    x = 20,221.11

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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.