Home / 20,918.81-31,381.00-11,058.48

Finding the Fourth Proportional to 20,918.81, 31,381.00 and 11,058.48

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Solution

The fourth proportional to 20,918.81, 31,381.00 and 11,058.48 is: 16,589.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.81 : 31,381.00 = 11,058.48 : x
  2. Step 2: Convert to fraction form
    20,918.81/31,381.00 = 11,058.48/x
  3. Step 3: Cross multiply
    20,918.81x = 31,381.00 × 11,058.48
  4. Step 4: Simplify right side
    20,918.81x = 347,026,133.23
  5. Step 5: Solve for x
    x = 347,026,133.23/20,918.81
  6. Step 6: Final answer
    x = 16,589.19

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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.