Home / 20,405.22-30,558.06-12,060.30

Finding the Fourth Proportional to 20,405.22, 30,558.06 and 12,060.30

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Solution

The fourth proportional to 20,405.22, 30,558.06 and 12,060.30 is: 18,061.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.22 : 30,558.06 = 12,060.30 : x
  2. Step 2: Convert to fraction form
    20,405.22/30,558.06 = 12,060.30/x
  3. Step 3: Cross multiply
    20,405.22x = 30,558.06 × 12,060.30
  4. Step 4: Simplify right side
    20,405.22x = 368,539,371.02
  5. Step 5: Solve for x
    x = 368,539,371.02/20,405.22
  6. Step 6: Final answer
    x = 18,061.03

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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.