Home / 18,914.25-28,368.82-7,819.40

Finding the Fourth Proportional to 18,914.25, 28,368.82 and 7,819.40

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Solution

The fourth proportional to 18,914.25, 28,368.82 and 7,819.40 is: 11,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914.25 : 28,368.82 = 7,819.40 : x
  2. Step 2: Convert to fraction form
    18,914.25/28,368.82 = 7,819.40/x
  3. Step 3: Cross multiply
    18,914.25x = 28,368.82 × 7,819.40
  4. Step 4: Simplify right side
    18,914.25x = 221,827,202.48
  5. Step 5: Solve for x
    x = 221,827,202.48/18,914.25
  6. Step 6: Final answer
    x = 11,728.05

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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.