Home / 13,755.40-20,630.70-4,985.80

Finding the Fourth Proportional to 13,755.40, 20,630.70 and 4,985.80

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Solution

The fourth proportional to 13,755.40, 20,630.70 and 4,985.80 is: 7,477.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.40 : 20,630.70 = 4,985.80 : x
  2. Step 2: Convert to fraction form
    13,755.40/20,630.70 = 4,985.80/x
  3. Step 3: Cross multiply
    13,755.40x = 20,630.70 × 4,985.80
  4. Step 4: Simplify right side
    13,755.40x = 102,860,544.06
  5. Step 5: Solve for x
    x = 102,860,544.06/13,755.40
  6. Step 6: Final answer
    x = 7,477.83

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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.