Home / 8,065.20-11,129.60-4,480.40

Finding the Fourth Proportional to 8,065.20, 11,129.60 and 4,480.40

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Solution

The fourth proportional to 8,065.20, 11,129.60 and 4,480.40 is: 6,182.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,065.20 : 11,129.60 = 4,480.40 : x
  2. Step 2: Convert to fraction form
    8,065.20/11,129.60 = 4,480.40/x
  3. Step 3: Cross multiply
    8,065.20x = 11,129.60 × 4,480.40
  4. Step 4: Simplify right side
    8,065.20x = 49,865,059.84
  5. Step 5: Solve for x
    x = 49,865,059.84/8,065.20
  6. Step 6: Final answer
    x = 6,182.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.