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Finding the Fourth Proportional to 12,791.61, 17,657.87 and 8,602.29

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Solution

The fourth proportional to 12,791.61, 17,657.87 and 8,602.29 is: 11,874.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.61 : 17,657.87 = 8,602.29 : x
  2. Step 2: Convert to fraction form
    12,791.61/17,657.87 = 8,602.29/x
  3. Step 3: Cross multiply
    12,791.61x = 17,657.87 × 8,602.29
  4. Step 4: Simplify right side
    12,791.61x = 151,898,075.51
  5. Step 5: Solve for x
    x = 151,898,075.51/12,791.61
  6. Step 6: Final answer
    x = 11,874.82

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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.