Home / 8,919.92-13,380-4,240.40

Finding the Fourth Proportional to 8,919.92, 13,380 and 4,240.40

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Solution

The fourth proportional to 8,919.92, 13,380 and 4,240.40 is: 6,360.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.92 : 13,380 = 4,240.40 : x
  2. Step 2: Convert to fraction form
    8,919.92/13,380 = 4,240.40/x
  3. Step 3: Cross multiply
    8,919.92x = 13,380 × 4,240.40
  4. Step 4: Simplify right side
    8,919.92x = 56,736,585.45
  5. Step 5: Solve for x
    x = 56,736,585.45/8,919.92
  6. Step 6: Final answer
    x = 6,360.66

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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.