Home / 20,579.06-28,399.11-11,147.63

Finding the Fourth Proportional to 20,579.06, 28,399.11 and 11,147.63

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Solution

The fourth proportional to 20,579.06, 28,399.11 and 11,147.63 is: 15,383.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.06 : 28,399.11 = 11,147.63 : x
  2. Step 2: Convert to fraction form
    20,579.06/28,399.11 = 11,147.63/x
  3. Step 3: Cross multiply
    20,579.06x = 28,399.11 × 11,147.63
  4. Step 4: Simplify right side
    20,579.06x = 316,582,586.81
  5. Step 5: Solve for x
    x = 316,582,586.81/20,579.06
  6. Step 6: Final answer
    x = 15,383.72

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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.