Home / 12,143.19-18,200.19-5,120.49

Finding the Fourth Proportional to 12,143.19, 18,200.19 and 5,120.49

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Solution

The fourth proportional to 12,143.19, 18,200.19 and 5,120.49 is: 7,674.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.19 : 18,200.19 = 5,120.49 : x
  2. Step 2: Convert to fraction form
    12,143.19/18,200.19 = 5,120.49/x
  3. Step 3: Cross multiply
    12,143.19x = 18,200.19 × 5,120.49
  4. Step 4: Simplify right side
    12,143.19x = 93,193,890.89
  5. Step 5: Solve for x
    x = 93,193,890.89/12,143.19
  6. Step 6: Final answer
    x = 7,674.58

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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.