Home / 21,270.84-31,905.09-6,478.52

Finding the Fourth Proportional to 21,270.84, 31,905.09 and 6,478.52

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Solution

The fourth proportional to 21,270.84, 31,905.09 and 6,478.52 is: 9,717.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.84 : 31,905.09 = 6,478.52 : x
  2. Step 2: Convert to fraction form
    21,270.84/31,905.09 = 6,478.52/x
  3. Step 3: Cross multiply
    21,270.84x = 31,905.09 × 6,478.52
  4. Step 4: Simplify right side
    21,270.84x = 206,697,604.14
  5. Step 5: Solve for x
    x = 206,697,604.14/21,270.84
  6. Step 6: Final answer
    x = 9,717.42

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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.