Home / 20,972.95-28,943.87-12,021.95

Finding the Fourth Proportional to 20,972.95, 28,943.87 and 12,021.95

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Solution

The fourth proportional to 20,972.95, 28,943.87 and 12,021.95 is: 16,590.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.95 : 28,943.87 = 12,021.95 : x
  2. Step 2: Convert to fraction form
    20,972.95/28,943.87 = 12,021.95/x
  3. Step 3: Cross multiply
    20,972.95x = 28,943.87 × 12,021.95
  4. Step 4: Simplify right side
    20,972.95x = 347,961,553.12
  5. Step 5: Solve for x
    x = 347,961,553.12/20,972.95
  6. Step 6: Final answer
    x = 16,590.97

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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.