Home / 4,075-5,621.76-3,129.16

Finding the Fourth Proportional to 4,075, 5,621.76 and 3,129.16

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Solution

The fourth proportional to 4,075, 5,621.76 and 3,129.16 is: 4,316.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,075 : 5,621.76 = 3,129.16 : x
  2. Step 2: Convert to fraction form
    4,075/5,621.76 = 3,129.16/x
  3. Step 3: Cross multiply
    4,075x = 5,621.76 × 3,129.16
  4. Step 4: Simplify right side
    4,075x = 17,591,386.52
  5. Step 5: Solve for x
    x = 17,591,386.52/4,075
  6. Step 6: Final answer
    x = 4,316.90

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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.