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Finding the Fourth Proportional to 13,637.80, 18,809.49 and 9,333.44

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Solution

The fourth proportional to 13,637.80, 18,809.49 and 9,333.44 is: 12,872.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,637.80 : 18,809.49 = 9,333.44 : x
  2. Step 2: Convert to fraction form
    13,637.80/18,809.49 = 9,333.44/x
  3. Step 3: Cross multiply
    13,637.80x = 18,809.49 × 9,333.44
  4. Step 4: Simplify right side
    13,637.80x = 175,557,199.68
  5. Step 5: Solve for x
    x = 175,557,199.68/13,637.80
  6. Step 6: Final answer
    x = 12,872.84

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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.