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Finding the Fourth Proportional to 13,589.64, 18,753.46 and 7,621.30

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Solution

The fourth proportional to 13,589.64, 18,753.46 and 7,621.30 is: 10,517.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,589.64 : 18,753.46 = 7,621.30 : x
  2. Step 2: Convert to fraction form
    13,589.64/18,753.46 = 7,621.30/x
  3. Step 3: Cross multiply
    13,589.64x = 18,753.46 × 7,621.30
  4. Step 4: Simplify right side
    13,589.64x = 142,925,744.70
  5. Step 5: Solve for x
    x = 142,925,744.70/13,589.64
  6. Step 6: Final answer
    x = 10,517.26

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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.