Home / 11,370.28-15,660.63-9,879.88

Finding the Fourth Proportional to 11,370.28, 15,660.63 and 9,879.88

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Solution

The fourth proportional to 11,370.28, 15,660.63 and 9,879.88 is: 13,607.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,370.28 : 15,660.63 = 9,879.88 : x
  2. Step 2: Convert to fraction form
    11,370.28/15,660.63 = 9,879.88/x
  3. Step 3: Cross multiply
    11,370.28x = 15,660.63 × 9,879.88
  4. Step 4: Simplify right side
    11,370.28x = 154,725,145.12
  5. Step 5: Solve for x
    x = 154,725,145.12/11,370.28
  6. Step 6: Final answer
    x = 13,607.86

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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.