Home / 20,406.94-28,160.87-12,342.58

Finding the Fourth Proportional to 20,406.94, 28,160.87 and 12,342.58

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Solution

The fourth proportional to 20,406.94, 28,160.87 and 12,342.58 is: 17,032.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.94 : 28,160.87 = 12,342.58 : x
  2. Step 2: Convert to fraction form
    20,406.94/28,160.87 = 12,342.58/x
  3. Step 3: Cross multiply
    20,406.94x = 28,160.87 × 12,342.58
  4. Step 4: Simplify right side
    20,406.94x = 347,577,658.73
  5. Step 5: Solve for x
    x = 347,577,658.73/20,406.94
  6. Step 6: Final answer
    x = 17,032.33

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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.