Home / 20,761.28-31,252.73-18,618

Finding the Fourth Proportional to 20,761.28, 31,252.73 and 18,618

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Solution

The fourth proportional to 20,761.28, 31,252.73 and 18,618 is: 28,026.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.28 : 31,252.73 = 18,618 : x
  2. Step 2: Convert to fraction form
    20,761.28/31,252.73 = 18,618/x
  3. Step 3: Cross multiply
    20,761.28x = 31,252.73 × 18,618
  4. Step 4: Simplify right side
    20,761.28x = 581,863,327.14
  5. Step 5: Solve for x
    x = 581,863,327.14/20,761.28
  6. Step 6: Final answer
    x = 28,026.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.