Home / 13,857.39-19,122.48-7,889.04

Finding the Fourth Proportional to 13,857.39, 19,122.48 and 7,889.04

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Solution

The fourth proportional to 13,857.39, 19,122.48 and 7,889.04 is: 10,886.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.39 : 19,122.48 = 7,889.04 : x
  2. Step 2: Convert to fraction form
    13,857.39/19,122.48 = 7,889.04/x
  3. Step 3: Cross multiply
    13,857.39x = 19,122.48 × 7,889.04
  4. Step 4: Simplify right side
    13,857.39x = 150,858,009.62
  5. Step 5: Solve for x
    x = 150,858,009.62/13,857.39
  6. Step 6: Final answer
    x = 10,886.47

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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.