Home / 13,638.60-18,821.70-7,669.98

Finding the Fourth Proportional to 13,638.60, 18,821.70 and 7,669.98

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Solution

The fourth proportional to 13,638.60, 18,821.70 and 7,669.98 is: 10,584.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.60 : 18,821.70 = 7,669.98 : x
  2. Step 2: Convert to fraction form
    13,638.60/18,821.70 = 7,669.98/x
  3. Step 3: Cross multiply
    13,638.60x = 18,821.70 × 7,669.98
  4. Step 4: Simplify right side
    13,638.60x = 144,362,062.57
  5. Step 5: Solve for x
    x = 144,362,062.57/13,638.60
  6. Step 6: Final answer
    x = 10,584.82

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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.