Home / 21,108.60-31,669.24-6,318

Finding the Fourth Proportional to 21,108.60, 31,669.24 and 6,318

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Solution

The fourth proportional to 21,108.60, 31,669.24 and 6,318 is: 9,478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.60 : 31,669.24 = 6,318 : x
  2. Step 2: Convert to fraction form
    21,108.60/31,669.24 = 6,318/x
  3. Step 3: Cross multiply
    21,108.60x = 31,669.24 × 6,318
  4. Step 4: Simplify right side
    21,108.60x = 200,086,258.32
  5. Step 5: Solve for x
    x = 200,086,258.32/21,108.60
  6. Step 6: Final answer
    x = 9,478.90

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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.