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Finding the Fourth Proportional to 19,077.78, 28,611.09 and 7,388.22

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Solution

The fourth proportional to 19,077.78, 28,611.09 and 7,388.22 is: 11,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,077.78 : 28,611.09 = 7,388.22 : x
  2. Step 2: Convert to fraction form
    19,077.78/28,611.09 = 7,388.22/x
  3. Step 3: Cross multiply
    19,077.78x = 28,611.09 × 7,388.22
  4. Step 4: Simplify right side
    19,077.78x = 211,385,027.36
  5. Step 5: Solve for x
    x = 211,385,027.36/19,077.78
  6. Step 6: Final answer
    x = 11,080.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.