Home / 20,475.12-30,749.64-10,621.20

Finding the Fourth Proportional to 20,475.12, 30,749.64 and 10,621.20

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Solution

The fourth proportional to 20,475.12, 30,749.64 and 10,621.20 is: 15,950.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.12 : 30,749.64 = 10,621.20 : x
  2. Step 2: Convert to fraction form
    20,475.12/30,749.64 = 10,621.20/x
  3. Step 3: Cross multiply
    20,475.12x = 30,749.64 × 10,621.20
  4. Step 4: Simplify right side
    20,475.12x = 326,598,076.37
  5. Step 5: Solve for x
    x = 326,598,076.37/20,475.12
  6. Step 6: Final answer
    x = 15,950.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.