Home / 5,126.80-7,075.56-2,888.72

Finding the Fourth Proportional to 5,126.80, 7,075.56 and 2,888.72

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Solution

The fourth proportional to 5,126.80, 7,075.56 and 2,888.72 is: 3,986.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.80 : 7,075.56 = 2,888.72 : x
  2. Step 2: Convert to fraction form
    5,126.80/7,075.56 = 2,888.72/x
  3. Step 3: Cross multiply
    5,126.80x = 7,075.56 × 2,888.72
  4. Step 4: Simplify right side
    5,126.80x = 20,439,311.68
  5. Step 5: Solve for x
    x = 20,439,311.68/5,126.80
  6. Step 6: Final answer
    x = 3,986.76

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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.