Home / 13,779.75-20,669.64-3,391.50

Finding the Fourth Proportional to 13,779.75, 20,669.64 and 3,391.50

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Solution

The fourth proportional to 13,779.75, 20,669.64 and 3,391.50 is: 5,087.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.75 : 20,669.64 = 3,391.50 : x
  2. Step 2: Convert to fraction form
    13,779.75/20,669.64 = 3,391.50/x
  3. Step 3: Cross multiply
    13,779.75x = 20,669.64 × 3,391.50
  4. Step 4: Simplify right side
    13,779.75x = 70,101,084.06
  5. Step 5: Solve for x
    x = 70,101,084.06/13,779.75
  6. Step 6: Final answer
    x = 5,087.25

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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.