Home / 13,857.12-19,121.76-7,889.04

Finding the Fourth Proportional to 13,857.12, 19,121.76 and 7,889.04

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Solution

The fourth proportional to 13,857.12, 19,121.76 and 7,889.04 is: 10,886.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.12 : 19,121.76 = 7,889.04 : x
  2. Step 2: Convert to fraction form
    13,857.12/19,121.76 = 7,889.04/x
  3. Step 3: Cross multiply
    13,857.12x = 19,121.76 × 7,889.04
  4. Step 4: Simplify right side
    13,857.12x = 150,852,329.51
  5. Step 5: Solve for x
    x = 150,852,329.51/13,857.12
  6. Step 6: Final answer
    x = 10,886.27

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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.