Home / 13,825.16-19,078.74-7,858.80

Finding the Fourth Proportional to 13,825.16, 19,078.74 and 7,858.80

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Solution

The fourth proportional to 13,825.16, 19,078.74 and 7,858.80 is: 10,845.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,825.16 : 19,078.74 = 7,858.80 : x
  2. Step 2: Convert to fraction form
    13,825.16/19,078.74 = 7,858.80/x
  3. Step 3: Cross multiply
    13,825.16x = 19,078.74 × 7,858.80
  4. Step 4: Simplify right side
    13,825.16x = 149,936,001.91
  5. Step 5: Solve for x
    x = 149,936,001.91/13,825.16
  6. Step 6: Final answer
    x = 10,845.16

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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.