Home / 13,880.45-19,153.62-7,911.78

Finding the Fourth Proportional to 13,880.45, 19,153.62 and 7,911.78

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Solution

The fourth proportional to 13,880.45, 19,153.62 and 7,911.78 is: 10,917.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.45 : 19,153.62 = 7,911.78 : x
  2. Step 2: Convert to fraction form
    13,880.45/19,153.62 = 7,911.78/x
  3. Step 3: Cross multiply
    13,880.45x = 19,153.62 × 7,911.78
  4. Step 4: Simplify right side
    13,880.45x = 151,539,227.64
  5. Step 5: Solve for x
    x = 151,539,227.64/13,880.45
  6. Step 6: Final answer
    x = 10,917.46

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1.5x scale

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.