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Finding the Fourth Proportional to 18,994.80, 26,212.80 and 10,611.30

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Solution

The fourth proportional to 18,994.80, 26,212.80 and 10,611.30 is: 14,643.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994.80 : 26,212.80 = 10,611.30 : x
  2. Step 2: Convert to fraction form
    18,994.80/26,212.80 = 10,611.30/x
  3. Step 3: Cross multiply
    18,994.80x = 26,212.80 × 10,611.30
  4. Step 4: Simplify right side
    18,994.80x = 278,151,884.64
  5. Step 5: Solve for x
    x = 278,151,884.64/18,994.80
  6. Step 6: Final answer
    x = 14,643.58

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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.