Home / 12,147.57-18,254.77-7,218.32

Finding the Fourth Proportional to 12,147.57, 18,254.77 and 7,218.32

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Solution

The fourth proportional to 12,147.57, 18,254.77 and 7,218.32 is: 10,847.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.57 : 18,254.77 = 7,218.32 : x
  2. Step 2: Convert to fraction form
    12,147.57/18,254.77 = 7,218.32/x
  3. Step 3: Cross multiply
    12,147.57x = 18,254.77 × 7,218.32
  4. Step 4: Simplify right side
    12,147.57x = 131,768,662.07
  5. Step 5: Solve for x
    x = 131,768,662.07/12,147.57
  6. Step 6: Final answer
    x = 10,847.33

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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.