Home / 21,163.52-31,558.96-19,686.08

Finding the Fourth Proportional to 21,163.52, 31,558.96 and 19,686.08

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Solution

The fourth proportional to 21,163.52, 31,558.96 and 19,686.08 is: 29,355.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.52 : 31,558.96 = 19,686.08 : x
  2. Step 2: Convert to fraction form
    21,163.52/31,558.96 = 19,686.08/x
  3. Step 3: Cross multiply
    21,163.52x = 31,558.96 × 19,686.08
  4. Step 4: Simplify right side
    21,163.52x = 621,272,211.28
  5. Step 5: Solve for x
    x = 621,272,211.28/21,163.52
  6. Step 6: Final answer
    x = 29,355.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.