Home / 21,213.24-31,819.88-6,421.84

Finding the Fourth Proportional to 21,213.24, 31,819.88 and 6,421.84

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Solution

The fourth proportional to 21,213.24, 31,819.88 and 6,421.84 is: 9,632.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.24 : 31,819.88 = 6,421.84 : x
  2. Step 2: Convert to fraction form
    21,213.24/31,819.88 = 6,421.84/x
  3. Step 3: Cross multiply
    21,213.24x = 31,819.88 × 6,421.84
  4. Step 4: Simplify right side
    21,213.24x = 204,342,178.18
  5. Step 5: Solve for x
    x = 204,342,178.18/21,213.24
  6. Step 6: Final answer
    x = 9,632.77

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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.