Home / 20,209.89-30,318.21-9,116.33

Finding the Fourth Proportional to 20,209.89, 30,318.21 and 9,116.33

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Solution

The fourth proportional to 20,209.89, 30,318.21 and 9,116.33 is: 13,676.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.89 : 30,318.21 = 9,116.33 : x
  2. Step 2: Convert to fraction form
    20,209.89/30,318.21 = 9,116.33/x
  3. Step 3: Cross multiply
    20,209.89x = 30,318.21 × 9,116.33
  4. Step 4: Simplify right side
    20,209.89x = 276,390,883.16
  5. Step 5: Solve for x
    x = 276,390,883.16/20,209.89
  6. Step 6: Final answer
    x = 13,676.02

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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.