Home / 21,212.57-31,819.31-6,421.47

Finding the Fourth Proportional to 21,212.57, 31,819.31 and 6,421.47

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Solution

The fourth proportional to 21,212.57, 31,819.31 and 6,421.47 is: 9,632.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.57 : 31,819.31 = 6,421.47 : x
  2. Step 2: Convert to fraction form
    21,212.57/31,819.31 = 6,421.47/x
  3. Step 3: Cross multiply
    21,212.57x = 31,819.31 × 6,421.47
  4. Step 4: Simplify right side
    21,212.57x = 204,326,744.59
  5. Step 5: Solve for x
    x = 204,326,744.59/21,212.57
  6. Step 6: Final answer
    x = 9,632.34

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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.