Home / 21,320.43-31,959.99-11,964.93

Finding the Fourth Proportional to 21,320.43, 31,959.99 and 11,964.93

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Solution

The fourth proportional to 21,320.43, 31,959.99 and 11,964.93 is: 17,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.43 : 31,959.99 = 11,964.93 : x
  2. Step 2: Convert to fraction form
    21,320.43/31,959.99 = 11,964.93/x
  3. Step 3: Cross multiply
    21,320.43x = 31,959.99 × 11,964.93
  4. Step 4: Simplify right side
    21,320.43x = 382,399,043.15
  5. Step 5: Solve for x
    x = 382,399,043.15/21,320.43
  6. Step 6: Final answer
    x = 17,935.80

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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.