Home / 13,859.51-19,121.30-7,889.64

Finding the Fourth Proportional to 13,859.51, 19,121.30 and 7,889.64

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Solution

The fourth proportional to 13,859.51, 19,121.30 and 7,889.64 is: 10,884.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.51 : 19,121.30 = 7,889.64 : x
  2. Step 2: Convert to fraction form
    13,859.51/19,121.30 = 7,889.64/x
  3. Step 3: Cross multiply
    13,859.51x = 19,121.30 × 7,889.64
  4. Step 4: Simplify right side
    13,859.51x = 150,860,091.77
  5. Step 5: Solve for x
    x = 150,860,091.77/13,859.51
  6. Step 6: Final answer
    x = 10,884.96

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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.