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Finding the Fourth Proportional to 20,683.98, 30,806.91 and 20,583.18

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Solution

The fourth proportional to 20,683.98, 30,806.91 and 20,583.18 is: 30,656.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.98 : 30,806.91 = 20,583.18 : x
  2. Step 2: Convert to fraction form
    20,683.98/30,806.91 = 20,583.18/x
  3. Step 3: Cross multiply
    20,683.98x = 30,806.91 × 20,583.18
  4. Step 4: Simplify right side
    20,683.98x = 634,104,173.77
  5. Step 5: Solve for x
    x = 634,104,173.77/20,683.98
  6. Step 6: Final answer
    x = 30,656.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.