Home / 5,118.72-7,671.60-2,928.64

Finding the Fourth Proportional to 5,118.72, 7,671.60 and 2,928.64

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Solution

The fourth proportional to 5,118.72, 7,671.60 and 2,928.64 is: 4,389.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.72 : 7,671.60 = 2,928.64 : x
  2. Step 2: Convert to fraction form
    5,118.72/7,671.60 = 2,928.64/x
  3. Step 3: Cross multiply
    5,118.72x = 7,671.60 × 2,928.64
  4. Step 4: Simplify right side
    5,118.72x = 22,467,354.62
  5. Step 5: Solve for x
    x = 22,467,354.62/5,118.72
  6. Step 6: Final answer
    x = 4,389.25

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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.