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Finding the Fourth Proportional to 13,736.84, 18,956.84 and 7,449.21

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Solution

The fourth proportional to 13,736.84, 18,956.84 and 7,449.21 is: 10,279.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,736.84 : 18,956.84 = 7,449.21 : x
  2. Step 2: Convert to fraction form
    13,736.84/18,956.84 = 7,449.21/x
  3. Step 3: Cross multiply
    13,736.84x = 18,956.84 × 7,449.21
  4. Step 4: Simplify right side
    13,736.84x = 141,213,444.85
  5. Step 5: Solve for x
    x = 141,213,444.85/13,736.84
  6. Step 6: Final answer
    x = 10,279.91

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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.