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Finding the Fourth Proportional to 8,505.12, 11,739.04 and 5,365.60

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Solution

The fourth proportional to 8,505.12, 11,739.04 and 5,365.60 is: 7,405.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.12 : 11,739.04 = 5,365.60 : x
  2. Step 2: Convert to fraction form
    8,505.12/11,739.04 = 5,365.60/x
  3. Step 3: Cross multiply
    8,505.12x = 11,739.04 × 5,365.60
  4. Step 4: Simplify right side
    8,505.12x = 62,986,993.02
  5. Step 5: Solve for x
    x = 62,986,993.02/8,505.12
  6. Step 6: Final answer
    x = 7,405.77

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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.