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Finding the Fourth Proportional to 20,999.69, 31,505.68 and 6,208.99

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Solution

The fourth proportional to 20,999.69, 31,505.68 and 6,208.99 is: 9,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.69 : 31,505.68 = 6,208.99 : x
  2. Step 2: Convert to fraction form
    20,999.69/31,505.68 = 6,208.99/x
  3. Step 3: Cross multiply
    20,999.69x = 31,505.68 × 6,208.99
  4. Step 4: Simplify right side
    20,999.69x = 195,618,347.53
  5. Step 5: Solve for x
    x = 195,618,347.53/20,999.69
  6. Step 6: Final answer
    x = 9,315.30

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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.