Home / 12,182.86-16,812.48-7,147.16

Finding the Fourth Proportional to 12,182.86, 16,812.48 and 7,147.16

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Solution

The fourth proportional to 12,182.86, 16,812.48 and 7,147.16 is: 9,863.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,182.86 : 16,812.48 = 7,147.16 : x
  2. Step 2: Convert to fraction form
    12,182.86/16,812.48 = 7,147.16/x
  3. Step 3: Cross multiply
    12,182.86x = 16,812.48 × 7,147.16
  4. Step 4: Simplify right side
    12,182.86x = 120,161,571.51
  5. Step 5: Solve for x
    x = 120,161,571.51/12,182.86
  6. Step 6: Final answer
    x = 9,863.17

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Double scale
Find fourth proportional to 12,183.86, 16,813.86 and 7,148.16
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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.