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Finding the Fourth Proportional to 13,615.63, 18,792.80 and 8,314.90

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Solution

The fourth proportional to 13,615.63, 18,792.80 and 8,314.90 is: 11,476.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.63 : 18,792.80 = 8,314.90 : x
  2. Step 2: Convert to fraction form
    13,615.63/18,792.80 = 8,314.90/x
  3. Step 3: Cross multiply
    13,615.63x = 18,792.80 × 8,314.90
  4. Step 4: Simplify right side
    13,615.63x = 156,260,252.72
  5. Step 5: Solve for x
    x = 156,260,252.72/13,615.63
  6. Step 6: Final answer
    x = 11,476.53

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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.