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Finding the Fourth Proportional to 8,913.68, 12,300.40 and 4,879.73

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Solution

The fourth proportional to 8,913.68, 12,300.40 and 4,879.73 is: 6,733.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.68 : 12,300.40 = 4,879.73 : x
  2. Step 2: Convert to fraction form
    8,913.68/12,300.40 = 4,879.73/x
  3. Step 3: Cross multiply
    8,913.68x = 12,300.40 × 4,879.73
  4. Step 4: Simplify right side
    8,913.68x = 60,022,649.92
  5. Step 5: Solve for x
    x = 60,022,649.92/8,913.68
  6. Step 6: Final answer
    x = 6,733.77

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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.