Home / 13,390.86-18,481.67-7,724.59

Finding the Fourth Proportional to 13,390.86, 18,481.67 and 7,724.59

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Solution

The fourth proportional to 13,390.86, 18,481.67 and 7,724.59 is: 10,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.86 : 18,481.67 = 7,724.59 : x
  2. Step 2: Convert to fraction form
    13,390.86/18,481.67 = 7,724.59/x
  3. Step 3: Cross multiply
    13,390.86x = 18,481.67 × 7,724.59
  4. Step 4: Simplify right side
    13,390.86x = 142,763,323.27
  5. Step 5: Solve for x
    x = 142,763,323.27/13,390.86
  6. Step 6: Final answer
    x = 10,661.25

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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.