Home / 20,973.75-28,943.87-12,021.78

Finding the Fourth Proportional to 20,973.75, 28,943.87 and 12,021.78

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Solution

The fourth proportional to 20,973.75, 28,943.87 and 12,021.78 is: 16,590.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.75 : 28,943.87 = 12,021.78 : x
  2. Step 2: Convert to fraction form
    20,973.75/28,943.87 = 12,021.78/x
  3. Step 3: Cross multiply
    20,973.75x = 28,943.87 × 12,021.78
  4. Step 4: Simplify right side
    20,973.75x = 347,956,837.49
  5. Step 5: Solve for x
    x = 347,956,837.49/20,973.75
  6. Step 6: Final answer
    x = 16,590.11

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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.