Home / 21,756.96-30,052.08-18,918.72

Finding the Fourth Proportional to 21,756.96, 30,052.08 and 18,918.72

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Solution

The fourth proportional to 21,756.96, 30,052.08 and 18,918.72 is: 26,131.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.96 : 30,052.08 = 18,918.72 : x
  2. Step 2: Convert to fraction form
    21,756.96/30,052.08 = 18,918.72/x
  3. Step 3: Cross multiply
    21,756.96x = 30,052.08 × 18,918.72
  4. Step 4: Simplify right side
    21,756.96x = 568,546,886.94
  5. Step 5: Solve for x
    x = 568,546,886.94/21,756.96
  6. Step 6: Final answer
    x = 26,131.72

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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.