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Finding the Fourth Proportional to 13,898.84, 20,850.88 and 5,579.51

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Solution

The fourth proportional to 13,898.84, 20,850.88 and 5,579.51 is: 8,370.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,898.84 : 20,850.88 = 5,579.51 : x
  2. Step 2: Convert to fraction form
    13,898.84/20,850.88 = 5,579.51/x
  3. Step 3: Cross multiply
    13,898.84x = 20,850.88 × 5,579.51
  4. Step 4: Simplify right side
    13,898.84x = 116,337,575.27
  5. Step 5: Solve for x
    x = 116,337,575.27/13,898.84
  6. Step 6: Final answer
    x = 8,370.31

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1.5x scale

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.