Home / 8,619.85-12,931.09-4,400.80

Finding the Fourth Proportional to 8,619.85, 12,931.09 and 4,400.80

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Solution

The fourth proportional to 8,619.85, 12,931.09 and 4,400.80 is: 6,601.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.85 : 12,931.09 = 4,400.80 : x
  2. Step 2: Convert to fraction form
    8,619.85/12,931.09 = 4,400.80/x
  3. Step 3: Cross multiply
    8,619.85x = 12,931.09 × 4,400.80
  4. Step 4: Simplify right side
    8,619.85x = 56,907,140.87
  5. Step 5: Solve for x
    x = 56,907,140.87/8,619.85
  6. Step 6: Final answer
    x = 6,601.87

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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.