Home / 5,127.60-7,075.56-2,889.12

Finding the Fourth Proportional to 5,127.60, 7,075.56 and 2,889.12

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Solution

The fourth proportional to 5,127.60, 7,075.56 and 2,889.12 is: 3,986.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,127.60 : 7,075.56 = 2,889.12 : x
  2. Step 2: Convert to fraction form
    5,127.60/7,075.56 = 2,889.12/x
  3. Step 3: Cross multiply
    5,127.60x = 7,075.56 × 2,889.12
  4. Step 4: Simplify right side
    5,127.60x = 20,442,141.91
  5. Step 5: Solve for x
    x = 20,442,141.91/5,127.60
  6. Step 6: Final answer
    x = 3,986.69

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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.