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Finding the Fourth Proportional to 13,664.63, 18,858.02 and 9,119.52

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Solution

The fourth proportional to 13,664.63, 18,858.02 and 9,119.52 is: 12,585.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.63 : 18,858.02 = 9,119.52 : x
  2. Step 2: Convert to fraction form
    13,664.63/18,858.02 = 9,119.52/x
  3. Step 3: Cross multiply
    13,664.63x = 18,858.02 × 9,119.52
  4. Step 4: Simplify right side
    13,664.63x = 171,976,044.95
  5. Step 5: Solve for x
    x = 171,976,044.95/13,664.63
  6. Step 6: Final answer
    x = 12,585.49

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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.