Home / 8,919.20-12,307.60-4,939.92

Finding the Fourth Proportional to 8,919.20, 12,307.60 and 4,939.92

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Solution

The fourth proportional to 8,919.20, 12,307.60 and 4,939.92 is: 6,816.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.20 : 12,307.60 = 4,939.92 : x
  2. Step 2: Convert to fraction form
    8,919.20/12,307.60 = 4,939.92/x
  3. Step 3: Cross multiply
    8,919.20x = 12,307.60 × 4,939.92
  4. Step 4: Simplify right side
    8,919.20x = 60,798,559.39
  5. Step 5: Solve for x
    x = 60,798,559.39/8,919.20
  6. Step 6: Final answer
    x = 6,816.59

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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.