Home / 8,619.47-12,928.95-2,379.87

Finding the Fourth Proportional to 8,619.47, 12,928.95 and 2,379.87

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Solution

The fourth proportional to 8,619.47, 12,928.95 and 2,379.87 is: 3,569.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.47 : 12,928.95 = 2,379.87 : x
  2. Step 2: Convert to fraction form
    8,619.47/12,928.95 = 2,379.87/x
  3. Step 3: Cross multiply
    8,619.47x = 12,928.95 × 2,379.87
  4. Step 4: Simplify right side
    8,619.47x = 30,769,155.59
  5. Step 5: Solve for x
    x = 30,769,155.59/8,619.47
  6. Step 6: Final answer
    x = 3,569.73

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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.