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Finding the Fourth Proportional to 30,718.88, 46,019.20 and 18,837.96

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Solution

The fourth proportional to 30,718.88, 46,019.20 and 18,837.96 is: 28,220.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,718.88 : 46,019.20 = 18,837.96 : x
  2. Step 2: Convert to fraction form
    30,718.88/46,019.20 = 18,837.96/x
  3. Step 3: Cross multiply
    30,718.88x = 46,019.20 × 18,837.96
  4. Step 4: Simplify right side
    30,718.88x = 866,907,848.83
  5. Step 5: Solve for x
    x = 866,907,848.83/30,718.88
  6. Step 6: Final answer
    x = 28,220.69

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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.