Home / 19,639.31-27,100.80-11,143.22

Finding the Fourth Proportional to 19,639.31, 27,100.80 and 11,143.22

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Solution

The fourth proportional to 19,639.31, 27,100.80 and 11,143.22 is: 15,376.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.31 : 27,100.80 = 11,143.22 : x
  2. Step 2: Convert to fraction form
    19,639.31/27,100.80 = 11,143.22/x
  3. Step 3: Cross multiply
    19,639.31x = 27,100.80 × 11,143.22
  4. Step 4: Simplify right side
    19,639.31x = 301,990,041.07
  5. Step 5: Solve for x
    x = 301,990,041.07/19,639.31
  6. Step 6: Final answer
    x = 15,376.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.