Home / 13,855.01-19,120.89-7,886.68

Finding the Fourth Proportional to 13,855.01, 19,120.89 and 7,886.68

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Solution

The fourth proportional to 13,855.01, 19,120.89 and 7,886.68 is: 10,884.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.01 : 19,120.89 = 7,886.68 : x
  2. Step 2: Convert to fraction form
    13,855.01/19,120.89 = 7,886.68/x
  3. Step 3: Cross multiply
    13,855.01x = 19,120.89 × 7,886.68
  4. Step 4: Simplify right side
    13,855.01x = 150,800,340.75
  5. Step 5: Solve for x
    x = 150,800,340.75/13,855.01
  6. Step 6: Final answer
    x = 10,884.17

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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.