Home / 15,015.64-20,719.78-8,300.36

Finding the Fourth Proportional to 15,015.64, 20,719.78 and 8,300.36

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Solution

The fourth proportional to 15,015.64, 20,719.78 and 8,300.36 is: 11,453.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.64 : 20,719.78 = 8,300.36 : x
  2. Step 2: Convert to fraction form
    15,015.64/20,719.78 = 8,300.36/x
  3. Step 3: Cross multiply
    15,015.64x = 20,719.78 × 8,300.36
  4. Step 4: Simplify right side
    15,015.64x = 171,981,529.52
  5. Step 5: Solve for x
    x = 171,981,529.52/15,015.64
  6. Step 6: Final answer
    x = 11,453.49

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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.