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Finding the Fourth Proportional to 8,390.37, 12,568.28 and 4,919.25

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Solution

The fourth proportional to 8,390.37, 12,568.28 and 4,919.25 is: 7,368.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.37 : 12,568.28 = 4,919.25 : x
  2. Step 2: Convert to fraction form
    8,390.37/12,568.28 = 4,919.25/x
  3. Step 3: Cross multiply
    8,390.37x = 12,568.28 × 4,919.25
  4. Step 4: Simplify right side
    8,390.37x = 61,826,486.79
  5. Step 5: Solve for x
    x = 61,826,486.79/8,390.37
  6. Step 6: Final answer
    x = 7,368.74

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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.