Home / 13,912.74-19,200.26-7,781.28

Finding the Fourth Proportional to 13,912.74, 19,200.26 and 7,781.28

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Solution

The fourth proportional to 13,912.74, 19,200.26 and 7,781.28 is: 10,738.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.74 : 19,200.26 = 7,781.28 : x
  2. Step 2: Convert to fraction form
    13,912.74/19,200.26 = 7,781.28/x
  3. Step 3: Cross multiply
    13,912.74x = 19,200.26 × 7,781.28
  4. Step 4: Simplify right side
    13,912.74x = 149,402,618.59
  5. Step 5: Solve for x
    x = 149,402,618.59/13,912.74
  6. Step 6: Final answer
    x = 10,738.55

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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.