Home / 21,109.23-31,678.02-11,255.31

Finding the Fourth Proportional to 21,109.23, 31,678.02 and 11,255.31

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Solution

The fourth proportional to 21,109.23, 31,678.02 and 11,255.31 is: 16,890.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.23 : 31,678.02 = 11,255.31 : x
  2. Step 2: Convert to fraction form
    21,109.23/31,678.02 = 11,255.31/x
  3. Step 3: Cross multiply
    21,109.23x = 31,678.02 × 11,255.31
  4. Step 4: Simplify right side
    21,109.23x = 356,545,935.29
  5. Step 5: Solve for x
    x = 356,545,935.29/21,109.23
  6. Step 6: Final answer
    x = 16,890.52

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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.