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Finding the Fourth Proportional to 12,859.22, 19,268.89 and 8,918.17

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Solution

The fourth proportional to 12,859.22, 19,268.89 and 8,918.17 is: 13,363.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.22 : 19,268.89 = 8,918.17 : x
  2. Step 2: Convert to fraction form
    12,859.22/19,268.89 = 8,918.17/x
  3. Step 3: Cross multiply
    12,859.22x = 19,268.89 × 8,918.17
  4. Step 4: Simplify right side
    12,859.22x = 171,843,166.26
  5. Step 5: Solve for x
    x = 171,843,166.26/12,859.22
  6. Step 6: Final answer
    x = 13,363.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.