Home / 30,198.12-45,279.40-9,131.80

Finding the Fourth Proportional to 30,198.12, 45,279.40 and 9,131.80

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Solution

The fourth proportional to 30,198.12, 45,279.40 and 9,131.80 is: 13,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,198.12 : 45,279.40 = 9,131.80 : x
  2. Step 2: Convert to fraction form
    30,198.12/45,279.40 = 9,131.80/x
  3. Step 3: Cross multiply
    30,198.12x = 45,279.40 × 9,131.80
  4. Step 4: Simplify right side
    30,198.12x = 413,482,424.92
  5. Step 5: Solve for x
    x = 413,482,424.92/30,198.12
  6. Step 6: Final answer
    x = 13,692.32

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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.