Home / 13,878.55-19,151.93-7,912.14

Finding the Fourth Proportional to 13,878.55, 19,151.93 and 7,912.14

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Solution

The fourth proportional to 13,878.55, 19,151.93 and 7,912.14 is: 10,918.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.55 : 19,151.93 = 7,912.14 : x
  2. Step 2: Convert to fraction form
    13,878.55/19,151.93 = 7,912.14/x
  3. Step 3: Cross multiply
    13,878.55x = 19,151.93 × 7,912.14
  4. Step 4: Simplify right side
    13,878.55x = 151,532,759.75
  5. Step 5: Solve for x
    x = 151,532,759.75/13,878.55
  6. Step 6: Final answer
    x = 10,918.48

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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.