Home / 12,129.98-18,195.75-3,810.33

Finding the Fourth Proportional to 12,129.98, 18,195.75 and 3,810.33

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Solution

The fourth proportional to 12,129.98, 18,195.75 and 3,810.33 is: 5,715.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.98 : 18,195.75 = 3,810.33 : x
  2. Step 2: Convert to fraction form
    12,129.98/18,195.75 = 3,810.33/x
  3. Step 3: Cross multiply
    12,129.98x = 18,195.75 × 3,810.33
  4. Step 4: Simplify right side
    12,129.98x = 69,331,812.10
  5. Step 5: Solve for x
    x = 69,331,812.10/12,129.98
  6. Step 6: Final answer
    x = 5,715.74

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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.