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Finding the Fourth Proportional to 28,566, 39,421.62 and 15,990.48

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Solution

The fourth proportional to 28,566, 39,421.62 and 15,990.48 is: 22,067.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,566 : 39,421.62 = 15,990.48 : x
  2. Step 2: Convert to fraction form
    28,566/39,421.62 = 15,990.48/x
  3. Step 3: Cross multiply
    28,566x = 39,421.62 × 15,990.48
  4. Step 4: Simplify right side
    28,566x = 630,370,626.18
  5. Step 5: Solve for x
    x = 630,370,626.18/28,566
  6. Step 6: Final answer
    x = 22,067.16

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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.