Home / 20,419.94-30,630.72-6,389.39

Finding the Fourth Proportional to 20,419.94, 30,630.72 and 6,389.39

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Solution

The fourth proportional to 20,419.94, 30,630.72 and 6,389.39 is: 9,584.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.94 : 30,630.72 = 6,389.39 : x
  2. Step 2: Convert to fraction form
    20,419.94/30,630.72 = 6,389.39/x
  3. Step 3: Cross multiply
    20,419.94x = 30,630.72 × 6,389.39
  4. Step 4: Simplify right side
    20,419.94x = 195,711,616.06
  5. Step 5: Solve for x
    x = 195,711,616.06/20,419.94
  6. Step 6: Final answer
    x = 9,584.34

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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.