Home / 10,619.16-15,990.48-7,865.37

Finding the Fourth Proportional to 10,619.16, 15,990.48 and 7,865.37

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Solution

The fourth proportional to 10,619.16, 15,990.48 and 7,865.37 is: 11,843.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,619.16 : 15,990.48 = 7,865.37 : x
  2. Step 2: Convert to fraction form
    10,619.16/15,990.48 = 7,865.37/x
  3. Step 3: Cross multiply
    10,619.16x = 15,990.48 × 7,865.37
  4. Step 4: Simplify right side
    10,619.16x = 125,771,041.68
  5. Step 5: Solve for x
    x = 125,771,041.68/10,619.16
  6. Step 6: Final answer
    x = 11,843.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.