Home / 20,423.80-28,189.32-12,874.60

Finding the Fourth Proportional to 20,423.80, 28,189.32 and 12,874.60

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Solution

The fourth proportional to 20,423.80, 28,189.32 and 12,874.60 is: 17,769.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.80 : 28,189.32 = 12,874.60 : x
  2. Step 2: Convert to fraction form
    20,423.80/28,189.32 = 12,874.60/x
  3. Step 3: Cross multiply
    20,423.80x = 28,189.32 × 12,874.60
  4. Step 4: Simplify right side
    20,423.80x = 362,926,219.27
  5. Step 5: Solve for x
    x = 362,926,219.27/20,423.80
  6. Step 6: Final answer
    x = 17,769.77

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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.