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Finding the Fourth Proportional to 13,878, 20,817.02 and 5,670

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Solution

The fourth proportional to 13,878, 20,817.02 and 5,670 is: 8,505.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878 : 20,817.02 = 5,670 : x
  2. Step 2: Convert to fraction form
    13,878/20,817.02 = 5,670/x
  3. Step 3: Cross multiply
    13,878x = 20,817.02 × 5,670
  4. Step 4: Simplify right side
    13,878x = 118,032,503.40
  5. Step 5: Solve for x
    x = 118,032,503.40/13,878
  6. Step 6: Final answer
    x = 8,505.01

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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.