Home / 7,020.75-9,687.80-4,188.28

Finding the Fourth Proportional to 7,020.75, 9,687.80 and 4,188.28

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Solution

The fourth proportional to 7,020.75, 9,687.80 and 4,188.28 is: 5,779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.75 : 9,687.80 = 4,188.28 : x
  2. Step 2: Convert to fraction form
    7,020.75/9,687.80 = 4,188.28/x
  3. Step 3: Cross multiply
    7,020.75x = 9,687.80 × 4,188.28
  4. Step 4: Simplify right side
    7,020.75x = 40,575,218.98
  5. Step 5: Solve for x
    x = 40,575,218.98/7,020.75
  6. Step 6: Final answer
    x = 5,779.33

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1.5x scale

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.