Home / 20,973.78-28,945-12,022.77

Finding the Fourth Proportional to 20,973.78, 28,945 and 12,022.77

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Solution

The fourth proportional to 20,973.78, 28,945 and 12,022.77 is: 16,592.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.78 : 28,945 = 12,022.77 : x
  2. Step 2: Convert to fraction form
    20,973.78/28,945 = 12,022.77/x
  3. Step 3: Cross multiply
    20,973.78x = 28,945 × 12,022.77
  4. Step 4: Simplify right side
    20,973.78x = 347,998,932.93
  5. Step 5: Solve for x
    x = 347,998,932.93/20,973.78
  6. Step 6: Final answer
    x = 16,592.10

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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.