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Finding the Fourth Proportional to 13,753.64, 18,980.54 and 7,621.46

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Solution

The fourth proportional to 13,753.64, 18,980.54 and 7,621.46 is: 10,517.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.64 : 18,980.54 = 7,621.46 : x
  2. Step 2: Convert to fraction form
    13,753.64/18,980.54 = 7,621.46/x
  3. Step 3: Cross multiply
    13,753.64x = 18,980.54 × 7,621.46
  4. Step 4: Simplify right side
    13,753.64x = 144,659,426.39
  5. Step 5: Solve for x
    x = 144,659,426.39/13,753.64
  6. Step 6: Final answer
    x = 10,517.90

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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.