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Finding the Fourth Proportional to 13,633.93, 18,813.80 and 7,664.43

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Solution

The fourth proportional to 13,633.93, 18,813.80 and 7,664.43 is: 10,576.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,633.93 : 18,813.80 = 7,664.43 : x
  2. Step 2: Convert to fraction form
    13,633.93/18,813.80 = 7,664.43/x
  3. Step 3: Cross multiply
    13,633.93x = 18,813.80 × 7,664.43
  4. Step 4: Simplify right side
    13,633.93x = 144,197,053.13
  5. Step 5: Solve for x
    x = 144,197,053.13/13,633.93
  6. Step 6: Final answer
    x = 10,576.34

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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.