Home / 21,248.82-31,879.53-8,769.60

Finding the Fourth Proportional to 21,248.82, 31,879.53 and 8,769.60

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Solution

The fourth proportional to 21,248.82, 31,879.53 and 8,769.60 is: 13,157.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248.82 : 31,879.53 = 8,769.60 : x
  2. Step 2: Convert to fraction form
    21,248.82/31,879.53 = 8,769.60/x
  3. Step 3: Cross multiply
    21,248.82x = 31,879.53 × 8,769.60
  4. Step 4: Simplify right side
    21,248.82x = 279,570,726.29
  5. Step 5: Solve for x
    x = 279,570,726.29/21,248.82
  6. Step 6: Final answer
    x = 13,157.00

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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.