Home / 21,231.18-29,301.75-11,802.78

Finding the Fourth Proportional to 21,231.18, 29,301.75 and 11,802.78

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Solution

The fourth proportional to 21,231.18, 29,301.75 and 11,802.78 is: 16,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.18 : 29,301.75 = 11,802.78 : x
  2. Step 2: Convert to fraction form
    21,231.18/29,301.75 = 11,802.78/x
  3. Step 3: Cross multiply
    21,231.18x = 29,301.75 × 11,802.78
  4. Step 4: Simplify right side
    21,231.18x = 345,842,108.87
  5. Step 5: Solve for x
    x = 345,842,108.87/21,231.18
  6. Step 6: Final answer
    x = 16,289.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.