Home / 20,207.56-30,315.48-8,520.80

Finding the Fourth Proportional to 20,207.56, 30,315.48 and 8,520.80

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Solution

The fourth proportional to 20,207.56, 30,315.48 and 8,520.80 is: 12,782.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.56 : 30,315.48 = 8,520.80 : x
  2. Step 2: Convert to fraction form
    20,207.56/30,315.48 = 8,520.80/x
  3. Step 3: Cross multiply
    20,207.56x = 30,315.48 × 8,520.80
  4. Step 4: Simplify right side
    20,207.56x = 258,312,141.98
  5. Step 5: Solve for x
    x = 258,312,141.98/20,207.56
  6. Step 6: Final answer
    x = 12,782.95

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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.