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Finding the Fourth Proportional to 13,390.36, 18,480 and 7,801

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Solution

The fourth proportional to 13,390.36, 18,480 and 7,801 is: 10,766.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.36 : 18,480 = 7,801 : x
  2. Step 2: Convert to fraction form
    13,390.36/18,480 = 7,801/x
  3. Step 3: Cross multiply
    13,390.36x = 18,480 × 7,801
  4. Step 4: Simplify right side
    13,390.36x = 144,162,480
  5. Step 5: Solve for x
    x = 144,162,480/13,390.36
  6. Step 6: Final answer
    x = 10,766.14

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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.