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Finding the Fourth Proportional to 18,745.64, 28,109.02 and 6,261.32

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Solution

The fourth proportional to 18,745.64, 28,109.02 and 6,261.32 is: 9,388.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.64 : 28,109.02 = 6,261.32 : x
  2. Step 2: Convert to fraction form
    18,745.64/28,109.02 = 6,261.32/x
  3. Step 3: Cross multiply
    18,745.64x = 28,109.02 × 6,261.32
  4. Step 4: Simplify right side
    18,745.64x = 175,999,569.11
  5. Step 5: Solve for x
    x = 175,999,569.11/18,745.64
  6. Step 6: Final answer
    x = 9,388.83

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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.