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Finding the Fourth Proportional to 28,566.36, 39,422.10 and 15,991.08

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Solution

The fourth proportional to 28,566.36, 39,422.10 and 15,991.08 is: 22,067.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,566.36 : 39,422.10 = 15,991.08 : x
  2. Step 2: Convert to fraction form
    28,566.36/39,422.10 = 15,991.08/x
  3. Step 3: Cross multiply
    28,566.36x = 39,422.10 × 15,991.08
  4. Step 4: Simplify right side
    28,566.36x = 630,401,954.87
  5. Step 5: Solve for x
    x = 630,401,954.87/28,566.36
  6. Step 6: Final answer
    x = 22,067.98

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.