Home / 13,855.38-19,119.51-7,887.66

Finding the Fourth Proportional to 13,855.38, 19,119.51 and 7,887.66

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Solution

The fourth proportional to 13,855.38, 19,119.51 and 7,887.66 is: 10,884.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.38 : 19,119.51 = 7,887.66 : x
  2. Step 2: Convert to fraction form
    13,855.38/19,119.51 = 7,887.66/x
  3. Step 3: Cross multiply
    13,855.38x = 19,119.51 × 7,887.66
  4. Step 4: Simplify right side
    13,855.38x = 150,808,194.25
  5. Step 5: Solve for x
    x = 150,808,194.25/13,855.38
  6. Step 6: Final answer
    x = 10,884.45

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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.