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Finding the Fourth Proportional to 30,985.88, 46,479.35 and 12,517.88

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Solution

The fourth proportional to 30,985.88, 46,479.35 and 12,517.88 is: 18,777.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.88 : 46,479.35 = 12,517.88 : x
  2. Step 2: Convert to fraction form
    30,985.88/46,479.35 = 12,517.88/x
  3. Step 3: Cross multiply
    30,985.88x = 46,479.35 × 12,517.88
  4. Step 4: Simplify right side
    30,985.88x = 581,822,724.68
  5. Step 5: Solve for x
    x = 581,822,724.68/30,985.88
  6. Step 6: Final answer
    x = 18,777.03

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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.