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Finding the Fourth Proportional to 18,907.56, 28,340.52 and 7,808.22

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Solution

The fourth proportional to 18,907.56, 28,340.52 and 7,808.22 is: 11,703.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.56 : 28,340.52 = 7,808.22 : x
  2. Step 2: Convert to fraction form
    18,907.56/28,340.52 = 7,808.22/x
  3. Step 3: Cross multiply
    18,907.56x = 28,340.52 × 7,808.22
  4. Step 4: Simplify right side
    18,907.56x = 221,289,015.07
  5. Step 5: Solve for x
    x = 221,289,015.07/18,907.56
  6. Step 6: Final answer
    x = 11,703.73

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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.