Home / 18,905.93-28,360.20-6,420.86

Finding the Fourth Proportional to 18,905.93, 28,360.20 and 6,420.86

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Solution

The fourth proportional to 18,905.93, 28,360.20 and 6,420.86 is: 9,631.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.93 : 28,360.20 = 6,420.86 : x
  2. Step 2: Convert to fraction form
    18,905.93/28,360.20 = 6,420.86/x
  3. Step 3: Cross multiply
    18,905.93x = 28,360.20 × 6,420.86
  4. Step 4: Simplify right side
    18,905.93x = 182,096,873.77
  5. Step 5: Solve for x
    x = 182,096,873.77/18,905.93
  6. Step 6: Final answer
    x = 9,631.73

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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.