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Finding the Fourth Proportional to 13,360, 18,436.50 and 7,391.74

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Solution

The fourth proportional to 13,360, 18,436.50 and 7,391.74 is: 10,200.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,360 : 18,436.50 = 7,391.74 : x
  2. Step 2: Convert to fraction form
    13,360/18,436.50 = 7,391.74/x
  3. Step 3: Cross multiply
    13,360x = 18,436.50 × 7,391.74
  4. Step 4: Simplify right side
    13,360x = 136,277,814.51
  5. Step 5: Solve for x
    x = 136,277,814.51/13,360
  6. Step 6: Final answer
    x = 10,200.44

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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.