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Finding the Fourth Proportional to 18,131.10, 25,331.70 and 18,131.10

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Solution

The fourth proportional to 18,131.10, 25,331.70 and 18,131.10 is: 25,331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.10 : 25,331.70 = 18,131.10 : x
  2. Step 2: Convert to fraction form
    18,131.10/25,331.70 = 18,131.10/x
  3. Step 3: Cross multiply
    18,131.10x = 25,331.70 × 18,131.10
  4. Step 4: Simplify right side
    18,131.10x = 459,291,585.87
  5. Step 5: Solve for x
    x = 459,291,585.87/18,131.10
  6. Step 6: Final answer
    x = 25,331.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.