Home / 13,756.45-18,984.36-7,788

Finding the Fourth Proportional to 13,756.45, 18,984.36 and 7,788

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Solution

The fourth proportional to 13,756.45, 18,984.36 and 7,788 is: 10,747.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.45 : 18,984.36 = 7,788 : x
  2. Step 2: Convert to fraction form
    13,756.45/18,984.36 = 7,788/x
  3. Step 3: Cross multiply
    13,756.45x = 18,984.36 × 7,788
  4. Step 4: Simplify right side
    13,756.45x = 147,850,195.68
  5. Step 5: Solve for x
    x = 147,850,195.68/13,756.45
  6. Step 6: Final answer
    x = 10,747.70

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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.