Home / 20,683.45-28,543.80-11,731.33

Finding the Fourth Proportional to 20,683.45, 28,543.80 and 11,731.33

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Solution

The fourth proportional to 20,683.45, 28,543.80 and 11,731.33 is: 16,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.45 : 28,543.80 = 11,731.33 : x
  2. Step 2: Convert to fraction form
    20,683.45/28,543.80 = 11,731.33/x
  3. Step 3: Cross multiply
    20,683.45x = 28,543.80 × 11,731.33
  4. Step 4: Simplify right side
    20,683.45x = 334,856,737.25
  5. Step 5: Solve for x
    x = 334,856,737.25/20,683.45
  6. Step 6: Final answer
    x = 16,189.60

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1.5x scale

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.