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Finding the Fourth Proportional to 18,980.53, 26,189.12 and 11,018.63

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Solution

The fourth proportional to 18,980.53, 26,189.12 and 11,018.63 is: 15,203.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.53 : 26,189.12 = 11,018.63 : x
  2. Step 2: Convert to fraction form
    18,980.53/26,189.12 = 11,018.63/x
  3. Step 3: Cross multiply
    18,980.53x = 26,189.12 × 11,018.63
  4. Step 4: Simplify right side
    18,980.53x = 288,568,316.32
  5. Step 5: Solve for x
    x = 288,568,316.32/18,980.53
  6. Step 6: Final answer
    x = 15,203.39

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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.