Home / 13,478.25-18,611.45-8,450.89

Finding the Fourth Proportional to 13,478.25, 18,611.45 and 8,450.89

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Solution

The fourth proportional to 13,478.25, 18,611.45 and 8,450.89 is: 11,669.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.25 : 18,611.45 = 8,450.89 : x
  2. Step 2: Convert to fraction form
    13,478.25/18,611.45 = 8,450.89/x
  3. Step 3: Cross multiply
    13,478.25x = 18,611.45 × 8,450.89
  4. Step 4: Simplify right side
    13,478.25x = 157,283,316.69
  5. Step 5: Solve for x
    x = 157,283,316.69/13,478.25
  6. Step 6: Final answer
    x = 11,669.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.