Home / 13,579.35-18,739.76-7,611.63

Finding the Fourth Proportional to 13,579.35, 18,739.76 and 7,611.63

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Solution

The fourth proportional to 13,579.35, 18,739.76 and 7,611.63 is: 10,504.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.35 : 18,739.76 = 7,611.63 : x
  2. Step 2: Convert to fraction form
    13,579.35/18,739.76 = 7,611.63/x
  3. Step 3: Cross multiply
    13,579.35x = 18,739.76 × 7,611.63
  4. Step 4: Simplify right side
    13,579.35x = 142,640,119.41
  5. Step 5: Solve for x
    x = 142,640,119.41/13,579.35
  6. Step 6: Final answer
    x = 10,504.19

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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.