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Finding the Fourth Proportional to 7,992.48, 11,985.64 and 3,313.24

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Solution

The fourth proportional to 7,992.48, 11,985.64 and 3,313.24 is: 4,968.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992.48 : 11,985.64 = 3,313.24 : x
  2. Step 2: Convert to fraction form
    7,992.48/11,985.64 = 3,313.24/x
  3. Step 3: Cross multiply
    7,992.48x = 11,985.64 × 3,313.24
  4. Step 4: Simplify right side
    7,992.48x = 39,711,301.87
  5. Step 5: Solve for x
    x = 39,711,301.87/7,992.48
  6. Step 6: Final answer
    x = 4,968.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.