Home / 15,399.05-21,251.41-8,684.54

Finding the Fourth Proportional to 15,399.05, 21,251.41 and 8,684.54

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Solution

The fourth proportional to 15,399.05, 21,251.41 and 8,684.54 is: 11,985.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.05 : 21,251.41 = 8,684.54 : x
  2. Step 2: Convert to fraction form
    15,399.05/21,251.41 = 8,684.54/x
  3. Step 3: Cross multiply
    15,399.05x = 21,251.41 × 8,684.54
  4. Step 4: Simplify right side
    15,399.05x = 184,558,720.78
  5. Step 5: Solve for x
    x = 184,558,720.78/15,399.05
  6. Step 6: Final answer
    x = 11,985.07

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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.