Home / 21,328.43-31,971.99-11,972.93

Finding the Fourth Proportional to 21,328.43, 31,971.99 and 11,972.93

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Solution

The fourth proportional to 21,328.43, 31,971.99 and 11,972.93 is: 17,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.43 : 31,971.99 = 11,972.93 : x
  2. Step 2: Convert to fraction form
    21,328.43/31,971.99 = 11,972.93/x
  3. Step 3: Cross multiply
    21,328.43x = 31,971.99 × 11,972.93
  4. Step 4: Simplify right side
    21,328.43x = 382,798,398.23
  5. Step 5: Solve for x
    x = 382,798,398.23/21,328.43
  6. Step 6: Final answer
    x = 17,947.80

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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.