Home / 13,748.22-18,971.64-7,780.50

Finding the Fourth Proportional to 13,748.22, 18,971.64 and 7,780.50

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Solution

The fourth proportional to 13,748.22, 18,971.64 and 7,780.50 is: 10,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.22 : 18,971.64 = 7,780.50 : x
  2. Step 2: Convert to fraction form
    13,748.22/18,971.64 = 7,780.50/x
  3. Step 3: Cross multiply
    13,748.22x = 18,971.64 × 7,780.50
  4. Step 4: Simplify right side
    13,748.22x = 147,608,845.02
  5. Step 5: Solve for x
    x = 147,608,845.02/13,748.22
  6. Step 6: Final answer
    x = 10,736.58

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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.