Home / 15,105.06-20,842.74-8,390.79

Finding the Fourth Proportional to 15,105.06, 20,842.74 and 8,390.79

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Solution

The fourth proportional to 15,105.06, 20,842.74 and 8,390.79 is: 11,578.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.06 : 20,842.74 = 8,390.79 : x
  2. Step 2: Convert to fraction form
    15,105.06/20,842.74 = 8,390.79/x
  3. Step 3: Cross multiply
    15,105.06x = 20,842.74 × 8,390.79
  4. Step 4: Simplify right side
    15,105.06x = 174,887,054.36
  5. Step 5: Solve for x
    x = 174,887,054.36/15,105.06
  6. Step 6: Final answer
    x = 11,578.04

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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.