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Finding the Fourth Proportional to 20,268.78, 27,978.58 and 15,950.67

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Solution

The fourth proportional to 20,268.78, 27,978.58 and 15,950.67 is: 22,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.78 : 27,978.58 = 15,950.67 : x
  2. Step 2: Convert to fraction form
    20,268.78/27,978.58 = 15,950.67/x
  3. Step 3: Cross multiply
    20,268.78x = 27,978.58 × 15,950.67
  4. Step 4: Simplify right side
    20,268.78x = 446,277,056.77
  5. Step 5: Solve for x
    x = 446,277,056.77/20,268.78
  6. Step 6: Final answer
    x = 22,017.95

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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.