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Finding the Fourth Proportional to 18,907.56, 28,361.61 and 4,867.25

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Solution

The fourth proportional to 18,907.56, 28,361.61 and 4,867.25 is: 7,300.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.56 : 28,361.61 = 4,867.25 : x
  2. Step 2: Convert to fraction form
    18,907.56/28,361.61 = 4,867.25/x
  3. Step 3: Cross multiply
    18,907.56x = 28,361.61 × 4,867.25
  4. Step 4: Simplify right side
    18,907.56x = 138,042,904.46
  5. Step 5: Solve for x
    x = 138,042,904.46/18,907.56
  6. Step 6: Final answer
    x = 7,300.94

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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.