Home / 20,655.06-30,906.03-12,339.60

Finding the Fourth Proportional to 20,655.06, 30,906.03 and 12,339.60

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Solution

The fourth proportional to 20,655.06, 30,906.03 and 12,339.60 is: 18,463.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.06 : 30,906.03 = 12,339.60 : x
  2. Step 2: Convert to fraction form
    20,655.06/30,906.03 = 12,339.60/x
  3. Step 3: Cross multiply
    20,655.06x = 30,906.03 × 12,339.60
  4. Step 4: Simplify right side
    20,655.06x = 381,368,047.79
  5. Step 5: Solve for x
    x = 381,368,047.79/20,655.06
  6. Step 6: Final answer
    x = 18,463.66

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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.