Home / 19,911.36-29,866.05-7,430.43

Finding the Fourth Proportional to 19,911.36, 29,866.05 and 7,430.43

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Solution

The fourth proportional to 19,911.36, 29,866.05 and 7,430.43 is: 11,145.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.36 : 29,866.05 = 7,430.43 : x
  2. Step 2: Convert to fraction form
    19,911.36/29,866.05 = 7,430.43/x
  3. Step 3: Cross multiply
    19,911.36x = 29,866.05 × 7,430.43
  4. Step 4: Simplify right side
    19,911.36x = 221,917,593.90
  5. Step 5: Solve for x
    x = 221,917,593.90/19,911.36
  6. Step 6: Final answer
    x = 11,145.28

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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.