Home / 20,996.93-28,975.81-11,436.79

Finding the Fourth Proportional to 20,996.93, 28,975.81 and 11,436.79

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Solution

The fourth proportional to 20,996.93, 28,975.81 and 11,436.79 is: 15,782.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.93 : 28,975.81 = 11,436.79 : x
  2. Step 2: Convert to fraction form
    20,996.93/28,975.81 = 11,436.79/x
  3. Step 3: Cross multiply
    20,996.93x = 28,975.81 × 11,436.79
  4. Step 4: Simplify right side
    20,996.93x = 331,390,160.65
  5. Step 5: Solve for x
    x = 331,390,160.65/20,996.93
  6. Step 6: Final answer
    x = 15,782.79

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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.