Home / 19,821.36-29,744.04-7,977.77

Finding the Fourth Proportional to 19,821.36, 29,744.04 and 7,977.77

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Solution

The fourth proportional to 19,821.36, 29,744.04 and 7,977.77 is: 11,971.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,821.36 : 29,744.04 = 7,977.77 : x
  2. Step 2: Convert to fraction form
    19,821.36/29,744.04 = 7,977.77/x
  3. Step 3: Cross multiply
    19,821.36x = 29,744.04 × 7,977.77
  4. Step 4: Simplify right side
    19,821.36x = 237,290,951.76
  5. Step 5: Solve for x
    x = 237,290,951.76/19,821.36
  6. Step 6: Final answer
    x = 11,971.48

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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.