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Finding the Fourth Proportional to 11,797.60, 16,285.80 and 7,811.68

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Solution

The fourth proportional to 11,797.60, 16,285.80 and 7,811.68 is: 10,783.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,797.60 : 16,285.80 = 7,811.68 : x
  2. Step 2: Convert to fraction form
    11,797.60/16,285.80 = 7,811.68/x
  3. Step 3: Cross multiply
    11,797.60x = 16,285.80 × 7,811.68
  4. Step 4: Simplify right side
    11,797.60x = 127,219,458.14
  5. Step 5: Solve for x
    x = 127,219,458.14/11,797.60
  6. Step 6: Final answer
    x = 10,783.50

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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.