Home / 15,789.16-21,790.58-11,803.36

Finding the Fourth Proportional to 15,789.16, 21,790.58 and 11,803.36

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Solution

The fourth proportional to 15,789.16, 21,790.58 and 11,803.36 is: 16,289.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.16 : 21,790.58 = 11,803.36 : x
  2. Step 2: Convert to fraction form
    15,789.16/21,790.58 = 11,803.36/x
  3. Step 3: Cross multiply
    15,789.16x = 21,790.58 × 11,803.36
  4. Step 4: Simplify right side
    15,789.16x = 257,202,060.35
  5. Step 5: Solve for x
    x = 257,202,060.35/15,789.16
  6. Step 6: Final answer
    x = 16,289.79

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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.