Home / 21,053.37-31,564.26-12,731.69

Finding the Fourth Proportional to 21,053.37, 31,564.26 and 12,731.69

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Solution

The fourth proportional to 21,053.37, 31,564.26 and 12,731.69 is: 19,087.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.37 : 31,564.26 = 12,731.69 : x
  2. Step 2: Convert to fraction form
    21,053.37/31,564.26 = 12,731.69/x
  3. Step 3: Cross multiply
    21,053.37x = 31,564.26 × 12,731.69
  4. Step 4: Simplify right side
    21,053.37x = 401,866,263.32
  5. Step 5: Solve for x
    x = 401,866,263.32/21,053.37
  6. Step 6: Final answer
    x = 19,087.97

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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.