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Finding the Fourth Proportional to 13,978.02, 20,962.50 and 4,615.86

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Solution

The fourth proportional to 13,978.02, 20,962.50 and 4,615.86 is: 6,922.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,978.02 : 20,962.50 = 4,615.86 : x
  2. Step 2: Convert to fraction form
    13,978.02/20,962.50 = 4,615.86/x
  3. Step 3: Cross multiply
    13,978.02x = 20,962.50 × 4,615.86
  4. Step 4: Simplify right side
    13,978.02x = 96,759,965.25
  5. Step 5: Solve for x
    x = 96,759,965.25/13,978.02
  6. Step 6: Final answer
    x = 6,922.29

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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.