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Finding the Fourth Proportional to 13,403, 20,107.74 and 4,169

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Solution

The fourth proportional to 13,403, 20,107.74 and 4,169 is: 6,254.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,403 : 20,107.74 = 4,169 : x
  2. Step 2: Convert to fraction form
    13,403/20,107.74 = 4,169/x
  3. Step 3: Cross multiply
    13,403x = 20,107.74 × 4,169
  4. Step 4: Simplify right side
    13,403x = 83,829,168.06
  5. Step 5: Solve for x
    x = 83,829,168.06/13,403
  6. Step 6: Final answer
    x = 6,254.51

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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.