Home / 8,520.12-12,782.30-8,378.85

Finding the Fourth Proportional to 8,520.12, 12,782.30 and 8,378.85

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Solution

The fourth proportional to 8,520.12, 12,782.30 and 8,378.85 is: 12,570.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.12 : 12,782.30 = 8,378.85 : x
  2. Step 2: Convert to fraction form
    8,520.12/12,782.30 = 8,378.85/x
  3. Step 3: Cross multiply
    8,520.12x = 12,782.30 × 8,378.85
  4. Step 4: Simplify right side
    8,520.12x = 107,100,932.46
  5. Step 5: Solve for x
    x = 107,100,932.46/8,520.12
  6. Step 6: Final answer
    x = 12,570.35

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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.