Home / 13,428.66-18,540.63-8,132.70

Finding the Fourth Proportional to 13,428.66, 18,540.63 and 8,132.70

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Solution

The fourth proportional to 13,428.66, 18,540.63 and 8,132.70 is: 11,228.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.66 : 18,540.63 = 8,132.70 : x
  2. Step 2: Convert to fraction form
    13,428.66/18,540.63 = 8,132.70/x
  3. Step 3: Cross multiply
    13,428.66x = 18,540.63 × 8,132.70
  4. Step 4: Simplify right side
    13,428.66x = 150,785,381.60
  5. Step 5: Solve for x
    x = 150,785,381.60/13,428.66
  6. Step 6: Final answer
    x = 11,228.62

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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.