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Finding the Fourth Proportional to 13,492.15, 18,621.42 and 8,190.49

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Solution

The fourth proportional to 13,492.15, 18,621.42 and 8,190.49 is: 11,304.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,492.15 : 18,621.42 = 8,190.49 : x
  2. Step 2: Convert to fraction form
    13,492.15/18,621.42 = 8,190.49/x
  3. Step 3: Cross multiply
    13,492.15x = 18,621.42 × 8,190.49
  4. Step 4: Simplify right side
    13,492.15x = 152,518,554.30
  5. Step 5: Solve for x
    x = 152,518,554.30/13,492.15
  6. Step 6: Final answer
    x = 11,304.24

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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.