Home / 20,683.70-28,543.99-11,731.80

Finding the Fourth Proportional to 20,683.70, 28,543.99 and 11,731.80

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Solution

The fourth proportional to 20,683.70, 28,543.99 and 11,731.80 is: 16,190.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.70 : 28,543.99 = 11,731.80 : x
  2. Step 2: Convert to fraction form
    20,683.70/28,543.99 = 11,731.80/x
  3. Step 3: Cross multiply
    20,683.70x = 28,543.99 × 11,731.80
  4. Step 4: Simplify right side
    20,683.70x = 334,872,381.88
  5. Step 5: Solve for x
    x = 334,872,381.88/20,683.70
  6. Step 6: Final answer
    x = 16,190.16

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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.