Home / 28,004.70-38,620.53-20,439.05

Finding the Fourth Proportional to 28,004.70, 38,620.53 and 20,439.05

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Solution

The fourth proportional to 28,004.70, 38,620.53 and 20,439.05 is: 28,186.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.70 : 38,620.53 = 20,439.05 : x
  2. Step 2: Convert to fraction form
    28,004.70/38,620.53 = 20,439.05/x
  3. Step 3: Cross multiply
    28,004.70x = 38,620.53 × 20,439.05
  4. Step 4: Simplify right side
    28,004.70x = 789,366,967.83
  5. Step 5: Solve for x
    x = 789,366,967.83/28,004.70
  6. Step 6: Final answer
    x = 28,186.94

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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.