Home / 8,605.20-12,900.12-3,407.52

Finding the Fourth Proportional to 8,605.20, 12,900.12 and 3,407.52

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Solution

The fourth proportional to 8,605.20, 12,900.12 and 3,407.52 is: 5,108.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.20 : 12,900.12 = 3,407.52 : x
  2. Step 2: Convert to fraction form
    8,605.20/12,900.12 = 3,407.52/x
  3. Step 3: Cross multiply
    8,605.20x = 12,900.12 × 3,407.52
  4. Step 4: Simplify right side
    8,605.20x = 43,957,416.90
  5. Step 5: Solve for x
    x = 43,957,416.90/8,605.20
  6. Step 6: Final answer
    x = 5,108.24

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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.