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Finding the Fourth Proportional to 18,712.10, 26,231.50 and 18,712.10

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Solution

The fourth proportional to 18,712.10, 26,231.50 and 18,712.10 is: 26,231.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.10 : 26,231.50 = 18,712.10 : x
  2. Step 2: Convert to fraction form
    18,712.10/26,231.50 = 18,712.10/x
  3. Step 3: Cross multiply
    18,712.10x = 26,231.50 × 18,712.10
  4. Step 4: Simplify right side
    18,712.10x = 490,846,451.15
  5. Step 5: Solve for x
    x = 490,846,451.15/18,712.10
  6. Step 6: Final answer
    x = 26,231.50

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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.