Home / 21,157.12-31,748.86-19,186.31

Finding the Fourth Proportional to 21,157.12, 31,748.86 and 19,186.31

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Solution

The fourth proportional to 21,157.12, 31,748.86 and 19,186.31 is: 28,791.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.12 : 31,748.86 = 19,186.31 : x
  2. Step 2: Convert to fraction form
    21,157.12/31,748.86 = 19,186.31/x
  3. Step 3: Cross multiply
    21,157.12x = 31,748.86 × 19,186.31
  4. Step 4: Simplify right side
    21,157.12x = 609,143,470.11
  5. Step 5: Solve for x
    x = 609,143,470.11/21,157.12
  6. Step 6: Final answer
    x = 28,791.42

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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.