Home / 15,219.36-21,004.74-8,505.45

Finding the Fourth Proportional to 15,219.36, 21,004.74 and 8,505.45

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Solution

The fourth proportional to 15,219.36, 21,004.74 and 8,505.45 is: 11,738.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.36 : 21,004.74 = 8,505.45 : x
  2. Step 2: Convert to fraction form
    15,219.36/21,004.74 = 8,505.45/x
  3. Step 3: Cross multiply
    15,219.36x = 21,004.74 × 8,505.45
  4. Step 4: Simplify right side
    15,219.36x = 178,654,765.83
  5. Step 5: Solve for x
    x = 178,654,765.83/15,219.36
  6. Step 6: Final answer
    x = 11,738.65

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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.