Home / 12,172.72-18,259.26-3,407.80

Finding the Fourth Proportional to 12,172.72, 18,259.26 and 3,407.80

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Solution

The fourth proportional to 12,172.72, 18,259.26 and 3,407.80 is: 5,111.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.72 : 18,259.26 = 3,407.80 : x
  2. Step 2: Convert to fraction form
    12,172.72/18,259.26 = 3,407.80/x
  3. Step 3: Cross multiply
    12,172.72x = 18,259.26 × 3,407.80
  4. Step 4: Simplify right side
    12,172.72x = 62,223,906.23
  5. Step 5: Solve for x
    x = 62,223,906.23/12,172.72
  6. Step 6: Final answer
    x = 5,111.75

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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.