Home / 20,923.18-28,873.67-11,972.88

Finding the Fourth Proportional to 20,923.18, 28,873.67 and 11,972.88

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Solution

The fourth proportional to 20,923.18, 28,873.67 and 11,972.88 is: 16,522.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.18 : 28,873.67 = 11,972.88 : x
  2. Step 2: Convert to fraction form
    20,923.18/28,873.67 = 11,972.88/x
  3. Step 3: Cross multiply
    20,923.18x = 28,873.67 × 11,972.88
  4. Step 4: Simplify right side
    20,923.18x = 345,700,986.07
  5. Step 5: Solve for x
    x = 345,700,986.07/20,923.18
  6. Step 6: Final answer
    x = 16,522.39

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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.