Home / 20,853.69-31,285.50-6,813.75

Finding the Fourth Proportional to 20,853.69, 31,285.50 and 6,813.75

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Solution

The fourth proportional to 20,853.69, 31,285.50 and 6,813.75 is: 10,222.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.69 : 31,285.50 = 6,813.75 : x
  2. Step 2: Convert to fraction form
    20,853.69/31,285.50 = 6,813.75/x
  3. Step 3: Cross multiply
    20,853.69x = 31,285.50 × 6,813.75
  4. Step 4: Simplify right side
    20,853.69x = 213,171,575.63
  5. Step 5: Solve for x
    x = 213,171,575.63/20,853.69
  6. Step 6: Final answer
    x = 10,222.25

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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.