Home / 12,126.40-18,192.34-3,806.39

Finding the Fourth Proportional to 12,126.40, 18,192.34 and 3,806.39

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Solution

The fourth proportional to 12,126.40, 18,192.34 and 3,806.39 is: 5,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.40 : 18,192.34 = 3,806.39 : x
  2. Step 2: Convert to fraction form
    12,126.40/18,192.34 = 3,806.39/x
  3. Step 3: Cross multiply
    12,126.40x = 18,192.34 × 3,806.39
  4. Step 4: Simplify right side
    12,126.40x = 69,247,141.05
  5. Step 5: Solve for x
    x = 69,247,141.05/12,126.40
  6. Step 6: Final answer
    x = 5,710.45

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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.