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Finding the Fourth Proportional to 18,013.62, 26,991.27 and 13,639.62

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Solution

The fourth proportional to 18,013.62, 26,991.27 and 13,639.62 is: 20,437.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,013.62 : 26,991.27 = 13,639.62 : x
  2. Step 2: Convert to fraction form
    18,013.62/26,991.27 = 13,639.62/x
  3. Step 3: Cross multiply
    18,013.62x = 26,991.27 × 13,639.62
  4. Step 4: Simplify right side
    18,013.62x = 368,150,666.12
  5. Step 5: Solve for x
    x = 368,150,666.12/18,013.62
  6. Step 6: Final answer
    x = 20,437.35

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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.