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Finding the Fourth Proportional to 18,685.91, 25,786.24 and 10,188.10

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Solution

The fourth proportional to 18,685.91, 25,786.24 and 10,188.10 is: 14,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.91 : 25,786.24 = 10,188.10 : x
  2. Step 2: Convert to fraction form
    18,685.91/25,786.24 = 10,188.10/x
  3. Step 3: Cross multiply
    18,685.91x = 25,786.24 × 10,188.10
  4. Step 4: Simplify right side
    18,685.91x = 262,712,791.74
  5. Step 5: Solve for x
    x = 262,712,791.74/18,685.91
  6. Step 6: Final answer
    x = 14,059.40

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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.