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Finding the Fourth Proportional to 12,167.87, 16,791.84 and 7,130.88

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Solution

The fourth proportional to 12,167.87, 16,791.84 and 7,130.88 is: 9,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,167.87 : 16,791.84 = 7,130.88 : x
  2. Step 2: Convert to fraction form
    12,167.87/16,791.84 = 7,130.88/x
  3. Step 3: Cross multiply
    12,167.87x = 16,791.84 × 7,130.88
  4. Step 4: Simplify right side
    12,167.87x = 119,740,596.02
  5. Step 5: Solve for x
    x = 119,740,596.02/12,167.87
  6. Step 6: Final answer
    x = 9,840.72

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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.