Home / 21,051.36-31,549.20-11,169.60

Finding the Fourth Proportional to 21,051.36, 31,549.20 and 11,169.60

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Solution

The fourth proportional to 21,051.36, 31,549.20 and 11,169.60 is: 16,739.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.36 : 31,549.20 = 11,169.60 : x
  2. Step 2: Convert to fraction form
    21,051.36/31,549.20 = 11,169.60/x
  3. Step 3: Cross multiply
    21,051.36x = 31,549.20 × 11,169.60
  4. Step 4: Simplify right side
    21,051.36x = 352,391,944.32
  5. Step 5: Solve for x
    x = 352,391,944.32/21,051.36
  6. Step 6: Final answer
    x = 16,739.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.