Home / 30,279.12-45,415.89-8,091.70

Finding the Fourth Proportional to 30,279.12, 45,415.89 and 8,091.70

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Solution

The fourth proportional to 30,279.12, 45,415.89 and 8,091.70 is: 12,136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,279.12 : 45,415.89 = 8,091.70 : x
  2. Step 2: Convert to fraction form
    30,279.12/45,415.89 = 8,091.70/x
  3. Step 3: Cross multiply
    30,279.12x = 45,415.89 × 8,091.70
  4. Step 4: Simplify right side
    30,279.12x = 367,491,643.57
  5. Step 5: Solve for x
    x = 367,491,643.57/30,279.12
  6. Step 6: Final answer
    x = 12,136.80

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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.