Home / 13,143.38-18,138.21-8,039.66

Finding the Fourth Proportional to 13,143.38, 18,138.21 and 8,039.66

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Solution

The fourth proportional to 13,143.38, 18,138.21 and 8,039.66 is: 11,094.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.38 : 18,138.21 = 8,039.66 : x
  2. Step 2: Convert to fraction form
    13,143.38/18,138.21 = 8,039.66/x
  3. Step 3: Cross multiply
    13,143.38x = 18,138.21 × 8,039.66
  4. Step 4: Simplify right side
    13,143.38x = 145,825,041.41
  5. Step 5: Solve for x
    x = 145,825,041.41/13,143.38
  6. Step 6: Final answer
    x = 11,094.94

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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.