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Finding the Fourth Proportional to 19,978.67, 27,570.67 and 11,026.19

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Solution

The fourth proportional to 19,978.67, 27,570.67 and 11,026.19 is: 15,216.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,978.67 : 27,570.67 = 11,026.19 : x
  2. Step 2: Convert to fraction form
    19,978.67/27,570.67 = 11,026.19/x
  3. Step 3: Cross multiply
    19,978.67x = 27,570.67 × 11,026.19
  4. Step 4: Simplify right side
    19,978.67x = 303,999,487.21
  5. Step 5: Solve for x
    x = 303,999,487.21/19,978.67
  6. Step 6: Final answer
    x = 15,216.21

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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.