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Finding the Fourth Proportional to 18,636.00, 25,717.65 and 10,138.09

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Solution

The fourth proportional to 18,636.00, 25,717.65 and 10,138.09 is: 13,990.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.00 : 25,717.65 = 10,138.09 : x
  2. Step 2: Convert to fraction form
    18,636.00/25,717.65 = 10,138.09/x
  3. Step 3: Cross multiply
    18,636.00x = 25,717.65 × 10,138.09
  4. Step 4: Simplify right side
    18,636.00x = 260,727,826.47
  5. Step 5: Solve for x
    x = 260,727,826.47/18,636.00
  6. Step 6: Final answer
    x = 13,990.55

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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.