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Finding the Fourth Proportional to 13,387.62, 18,477.09 and 12,797.04

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Solution

The fourth proportional to 13,387.62, 18,477.09 and 12,797.04 is: 17,661.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.62 : 18,477.09 = 12,797.04 : x
  2. Step 2: Convert to fraction form
    13,387.62/18,477.09 = 12,797.04/x
  3. Step 3: Cross multiply
    13,387.62x = 18,477.09 × 12,797.04
  4. Step 4: Simplify right side
    13,387.62x = 236,452,059.81
  5. Step 5: Solve for x
    x = 236,452,059.81/13,387.62
  6. Step 6: Final answer
    x = 17,661.99

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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.