Home / 20,923.80-28,872.54-11,973.72

Finding the Fourth Proportional to 20,923.80, 28,872.54 and 11,973.72

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Solution

The fourth proportional to 20,923.80, 28,872.54 and 11,973.72 is: 16,522.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.80 : 28,872.54 = 11,973.72 : x
  2. Step 2: Convert to fraction form
    20,923.80/28,872.54 = 11,973.72/x
  3. Step 3: Cross multiply
    20,923.80x = 28,872.54 × 11,973.72
  4. Step 4: Simplify right side
    20,923.80x = 345,711,709.65
  5. Step 5: Solve for x
    x = 345,711,709.65/20,923.80
  6. Step 6: Final answer
    x = 16,522.42

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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.