Home / 15,890.21-21,928.49-8,816.62

Finding the Fourth Proportional to 15,890.21, 21,928.49 and 8,816.62

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Solution

The fourth proportional to 15,890.21, 21,928.49 and 8,816.62 is: 12,166.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.21 : 21,928.49 = 8,816.62 : x
  2. Step 2: Convert to fraction form
    15,890.21/21,928.49 = 8,816.62/x
  3. Step 3: Cross multiply
    15,890.21x = 21,928.49 × 8,816.62
  4. Step 4: Simplify right side
    15,890.21x = 193,335,163.50
  5. Step 5: Solve for x
    x = 193,335,163.50/15,890.21
  6. Step 6: Final answer
    x = 12,166.94

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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.