Home / 15,025.20-20,739.24-9,719.88

Finding the Fourth Proportional to 15,025.20, 20,739.24 and 9,719.88

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Solution

The fourth proportional to 15,025.20, 20,739.24 and 9,719.88 is: 13,416.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,025.20 : 20,739.24 = 9,719.88 : x
  2. Step 2: Convert to fraction form
    15,025.20/20,739.24 = 9,719.88/x
  3. Step 3: Cross multiply
    15,025.20x = 20,739.24 × 9,719.88
  4. Step 4: Simplify right side
    15,025.20x = 201,582,924.09
  5. Step 5: Solve for x
    x = 201,582,924.09/15,025.20
  6. Step 6: Final answer
    x = 13,416.32

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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.