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Finding the Fourth Proportional to 13,138.46, 18,124.81 and 8,891.01

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Solution

The fourth proportional to 13,138.46, 18,124.81 and 8,891.01 is: 12,265.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.46 : 18,124.81 = 8,891.01 : x
  2. Step 2: Convert to fraction form
    13,138.46/18,124.81 = 8,891.01/x
  3. Step 3: Cross multiply
    13,138.46x = 18,124.81 × 8,891.01
  4. Step 4: Simplify right side
    13,138.46x = 161,147,866.96
  5. Step 5: Solve for x
    x = 161,147,866.96/13,138.46
  6. Step 6: Final answer
    x = 12,265.35

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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.