Home / 30,229.60-45,328.20-12,679.60

Finding the Fourth Proportional to 30,229.60, 45,328.20 and 12,679.60

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Solution

The fourth proportional to 30,229.60, 45,328.20 and 12,679.60 is: 19,012.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,229.60 : 45,328.20 = 12,679.60 : x
  2. Step 2: Convert to fraction form
    30,229.60/45,328.20 = 12,679.60/x
  3. Step 3: Cross multiply
    30,229.60x = 45,328.20 × 12,679.60
  4. Step 4: Simplify right side
    30,229.60x = 574,743,444.72
  5. Step 5: Solve for x
    x = 574,743,444.72/30,229.60
  6. Step 6: Final answer
    x = 19,012.61

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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.