Home / 20,896.61-31,352.91-12,582.56

Finding the Fourth Proportional to 20,896.61, 31,352.91 and 12,582.56

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Solution

The fourth proportional to 20,896.61, 31,352.91 and 12,582.56 is: 18,878.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.61 : 31,352.91 = 12,582.56 : x
  2. Step 2: Convert to fraction form
    20,896.61/31,352.91 = 12,582.56/x
  3. Step 3: Cross multiply
    20,896.61x = 31,352.91 × 12,582.56
  4. Step 4: Simplify right side
    20,896.61x = 394,499,902.45
  5. Step 5: Solve for x
    x = 394,499,902.45/20,896.61
  6. Step 6: Final answer
    x = 18,878.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.