Home / 30,579.90-45,858.20-12,811.74

Finding the Fourth Proportional to 30,579.90, 45,858.20 and 12,811.74

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Solution

The fourth proportional to 30,579.90, 45,858.20 and 12,811.74 is: 19,212.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.90 : 45,858.20 = 12,811.74 : x
  2. Step 2: Convert to fraction form
    30,579.90/45,858.20 = 12,811.74/x
  3. Step 3: Cross multiply
    30,579.90x = 45,858.20 × 12,811.74
  4. Step 4: Simplify right side
    30,579.90x = 587,523,335.27
  5. Step 5: Solve for x
    x = 587,523,335.27/30,579.90
  6. Step 6: Final answer
    x = 19,212.73

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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.