Home / 20,896.80-31,344.87-8,416.53

Finding the Fourth Proportional to 20,896.80, 31,344.87 and 8,416.53

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Solution

The fourth proportional to 20,896.80, 31,344.87 and 8,416.53 is: 12,624.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.80 : 31,344.87 = 8,416.53 : x
  2. Step 2: Convert to fraction form
    20,896.80/31,344.87 = 8,416.53/x
  3. Step 3: Cross multiply
    20,896.80x = 31,344.87 × 8,416.53
  4. Step 4: Simplify right side
    20,896.80x = 263,815,038.70
  5. Step 5: Solve for x
    x = 263,815,038.70/20,896.80
  6. Step 6: Final answer
    x = 12,624.66

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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.