Home / 8,075.98-12,108.30-4,128.49

Finding the Fourth Proportional to 8,075.98, 12,108.30 and 4,128.49

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Solution

The fourth proportional to 8,075.98, 12,108.30 and 4,128.49 is: 6,189.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,075.98 : 12,108.30 = 4,128.49 : x
  2. Step 2: Convert to fraction form
    8,075.98/12,108.30 = 4,128.49/x
  3. Step 3: Cross multiply
    8,075.98x = 12,108.30 × 4,128.49
  4. Step 4: Simplify right side
    8,075.98x = 49,988,995.47
  5. Step 5: Solve for x
    x = 49,988,995.47/8,075.98
  6. Step 6: Final answer
    x = 6,189.84

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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.