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Finding the Fourth Proportional to 13,798.90, 18,918.23 and 13,550.20

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Solution

The fourth proportional to 13,798.90, 18,918.23 and 13,550.20 is: 18,577.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,798.90 : 18,918.23 = 13,550.20 : x
  2. Step 2: Convert to fraction form
    13,798.90/18,918.23 = 13,550.20/x
  3. Step 3: Cross multiply
    13,798.90x = 18,918.23 × 13,550.20
  4. Step 4: Simplify right side
    13,798.90x = 256,345,800.15
  5. Step 5: Solve for x
    x = 256,345,800.15/13,798.90
  6. Step 6: Final answer
    x = 18,577.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.