Home / 3,075.90-4,242.96-2,189.76

Finding the Fourth Proportional to 3,075.90, 4,242.96 and 2,189.76

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Solution

The fourth proportional to 3,075.90, 4,242.96 and 2,189.76 is: 3,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,075.90 : 4,242.96 = 2,189.76 : x
  2. Step 2: Convert to fraction form
    3,075.90/4,242.96 = 2,189.76/x
  3. Step 3: Cross multiply
    3,075.90x = 4,242.96 × 2,189.76
  4. Step 4: Simplify right side
    3,075.90x = 9,291,064.09
  5. Step 5: Solve for x
    x = 9,291,064.09/3,075.90
  6. Step 6: Final answer
    x = 3,020.60

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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.