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Finding the Fourth Proportional to 21,054.99, 31,571.92 and 7,010.07

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Solution

The fourth proportional to 21,054.99, 31,571.92 and 7,010.07 is: 10,511.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.99 : 31,571.92 = 7,010.07 : x
  2. Step 2: Convert to fraction form
    21,054.99/31,571.92 = 7,010.07/x
  3. Step 3: Cross multiply
    21,054.99x = 31,571.92 × 7,010.07
  4. Step 4: Simplify right side
    21,054.99x = 221,321,369.23
  5. Step 5: Solve for x
    x = 221,321,369.23/21,054.99
  6. Step 6: Final answer
    x = 10,511.59

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1.5x scale

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.