Home / 20,431.36-30,647.05-6,391.51

Finding the Fourth Proportional to 20,431.36, 30,647.05 and 6,391.51

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Solution

The fourth proportional to 20,431.36, 30,647.05 and 6,391.51 is: 9,587.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.36 : 30,647.05 = 6,391.51 : x
  2. Step 2: Convert to fraction form
    20,431.36/30,647.05 = 6,391.51/x
  3. Step 3: Cross multiply
    20,431.36x = 30,647.05 × 6,391.51
  4. Step 4: Simplify right side
    20,431.36x = 195,880,824.96
  5. Step 5: Solve for x
    x = 195,880,824.96/20,431.36
  6. Step 6: Final answer
    x = 9,587.26

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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.