Home / 13,611.78-20,411.82-6,220.89

Finding the Fourth Proportional to 13,611.78, 20,411.82 and 6,220.89

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Solution

The fourth proportional to 13,611.78, 20,411.82 and 6,220.89 is: 9,328.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.78 : 20,411.82 = 6,220.89 : x
  2. Step 2: Convert to fraction form
    13,611.78/20,411.82 = 6,220.89/x
  3. Step 3: Cross multiply
    13,611.78x = 20,411.82 × 6,220.89
  4. Step 4: Simplify right side
    13,611.78x = 126,979,686.92
  5. Step 5: Solve for x
    x = 126,979,686.92/13,611.78
  6. Step 6: Final answer
    x = 9,328.66

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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.