Home / 8,522.20-12,783.30-7,907.80

Finding the Fourth Proportional to 8,522.20, 12,783.30 and 7,907.80

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Solution

The fourth proportional to 8,522.20, 12,783.30 and 7,907.80 is: 11,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,522.20 : 12,783.30 = 7,907.80 : x
  2. Step 2: Convert to fraction form
    8,522.20/12,783.30 = 7,907.80/x
  3. Step 3: Cross multiply
    8,522.20x = 12,783.30 × 7,907.80
  4. Step 4: Simplify right side
    8,522.20x = 101,087,779.74
  5. Step 5: Solve for x
    x = 101,087,779.74/8,522.20
  6. Step 6: Final answer
    x = 11,861.70

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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.