Home / 20,405.08-28,158.06-12,019.96

Finding the Fourth Proportional to 20,405.08, 28,158.06 and 12,019.96

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Solution

The fourth proportional to 20,405.08, 28,158.06 and 12,019.96 is: 16,586.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.08 : 28,158.06 = 12,019.96 : x
  2. Step 2: Convert to fraction form
    20,405.08/28,158.06 = 12,019.96/x
  3. Step 3: Cross multiply
    20,405.08x = 28,158.06 × 12,019.96
  4. Step 4: Simplify right side
    20,405.08x = 338,458,754.88
  5. Step 5: Solve for x
    x = 338,458,754.88/20,405.08
  6. Step 6: Final answer
    x = 16,586.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.