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Finding the Fourth Proportional to 28,620, 39,495.60 and 16,683.84

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Solution

The fourth proportional to 28,620, 39,495.60 and 16,683.84 is: 23,023.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620 : 39,495.60 = 16,683.84 : x
  2. Step 2: Convert to fraction form
    28,620/39,495.60 = 16,683.84/x
  3. Step 3: Cross multiply
    28,620x = 39,495.60 × 16,683.84
  4. Step 4: Simplify right side
    28,620x = 658,938,271.10
  5. Step 5: Solve for x
    x = 658,938,271.10/28,620
  6. Step 6: Final answer
    x = 23,023.70

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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.