Home / 12,075.40-18,107.43-7,147.36

Finding the Fourth Proportional to 12,075.40, 18,107.43 and 7,147.36

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Solution

The fourth proportional to 12,075.40, 18,107.43 and 7,147.36 is: 10,717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,075.40 : 18,107.43 = 7,147.36 : x
  2. Step 2: Convert to fraction form
    12,075.40/18,107.43 = 7,147.36/x
  3. Step 3: Cross multiply
    12,075.40x = 18,107.43 × 7,147.36
  4. Step 4: Simplify right side
    12,075.40x = 129,420,320.88
  5. Step 5: Solve for x
    x = 129,420,320.88/12,075.40
  6. Step 6: Final answer
    x = 10,717.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.