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Finding the Fourth Proportional to 28,233.64, 38,964.18 and 15,659.56

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Solution

The fourth proportional to 28,233.64, 38,964.18 and 15,659.56 is: 21,611.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,233.64 : 38,964.18 = 15,659.56 : x
  2. Step 2: Convert to fraction form
    28,233.64/38,964.18 = 15,659.56/x
  3. Step 3: Cross multiply
    28,233.64x = 38,964.18 × 15,659.56
  4. Step 4: Simplify right side
    28,233.64x = 610,161,914.56
  5. Step 5: Solve for x
    x = 610,161,914.56/28,233.64
  6. Step 6: Final answer
    x = 21,611.17

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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.