Home / 12,075.80-18,113.70-3,311.60

Finding the Fourth Proportional to 12,075.80, 18,113.70 and 3,311.60

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Solution

The fourth proportional to 12,075.80, 18,113.70 and 3,311.60 is: 4,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,075.80 : 18,113.70 = 3,311.60 : x
  2. Step 2: Convert to fraction form
    12,075.80/18,113.70 = 3,311.60/x
  3. Step 3: Cross multiply
    12,075.80x = 18,113.70 × 3,311.60
  4. Step 4: Simplify right side
    12,075.80x = 59,985,328.92
  5. Step 5: Solve for x
    x = 59,985,328.92/12,075.80
  6. Step 6: Final answer
    x = 4,967.40

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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.