Home / 21,431.28-32,151.90-6,639.42

Finding the Fourth Proportional to 21,431.28, 32,151.90 and 6,639.42

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Solution

The fourth proportional to 21,431.28, 32,151.90 and 6,639.42 is: 9,960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.28 : 32,151.90 = 6,639.42 : x
  2. Step 2: Convert to fraction form
    21,431.28/32,151.90 = 6,639.42/x
  3. Step 3: Cross multiply
    21,431.28x = 32,151.90 × 6,639.42
  4. Step 4: Simplify right side
    21,431.28x = 213,469,967.90
  5. Step 5: Solve for x
    x = 213,469,967.90/21,431.28
  6. Step 6: Final answer
    x = 9,960.67

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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.