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Finding the Fourth Proportional to 18,697.70, 25,796.34 and 11,987.03

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Solution

The fourth proportional to 18,697.70, 25,796.34 and 11,987.03 is: 16,537.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.70 : 25,796.34 = 11,987.03 : x
  2. Step 2: Convert to fraction form
    18,697.70/25,796.34 = 11,987.03/x
  3. Step 3: Cross multiply
    18,697.70x = 25,796.34 × 11,987.03
  4. Step 4: Simplify right side
    18,697.70x = 309,221,501.47
  5. Step 5: Solve for x
    x = 309,221,501.47/18,697.70
  6. Step 6: Final answer
    x = 16,537.94

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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.