Home / 21,769.89-30,048.66-12,822.55

Finding the Fourth Proportional to 21,769.89, 30,048.66 and 12,822.55

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Solution

The fourth proportional to 21,769.89, 30,048.66 and 12,822.55 is: 17,698.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,769.89 : 30,048.66 = 12,822.55 : x
  2. Step 2: Convert to fraction form
    21,769.89/30,048.66 = 12,822.55/x
  3. Step 3: Cross multiply
    21,769.89x = 30,048.66 × 12,822.55
  4. Step 4: Simplify right side
    21,769.89x = 385,300,413.23
  5. Step 5: Solve for x
    x = 385,300,413.23/21,769.89
  6. Step 6: Final answer
    x = 17,698.78

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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.