Home / 20,828.03-31,247.51-7,680.51

Finding the Fourth Proportional to 20,828.03, 31,247.51 and 7,680.51

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Solution

The fourth proportional to 20,828.03, 31,247.51 and 7,680.51 is: 11,522.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.03 : 31,247.51 = 7,680.51 : x
  2. Step 2: Convert to fraction form
    20,828.03/31,247.51 = 7,680.51/x
  3. Step 3: Cross multiply
    20,828.03x = 31,247.51 × 7,680.51
  4. Step 4: Simplify right side
    20,828.03x = 239,996,774.63
  5. Step 5: Solve for x
    x = 239,996,774.63/20,828.03
  6. Step 6: Final answer
    x = 11,522.78

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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.