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Finding the Fourth Proportional to 28,791.90, 39,731.76 and 16,214.22

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Solution

The fourth proportional to 28,791.90, 39,731.76 and 16,214.22 is: 22,375.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,791.90 : 39,731.76 = 16,214.22 : x
  2. Step 2: Convert to fraction form
    28,791.90/39,731.76 = 16,214.22/x
  3. Step 3: Cross multiply
    28,791.90x = 39,731.76 × 16,214.22
  4. Step 4: Simplify right side
    28,791.90x = 644,219,497.63
  5. Step 5: Solve for x
    x = 644,219,497.63/28,791.90
  6. Step 6: Final answer
    x = 22,375.03

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1.5x scale

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.