Home / 12,821.76-19,215.90-7,277.58

Finding the Fourth Proportional to 12,821.76, 19,215.90 and 7,277.58

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Solution

The fourth proportional to 12,821.76, 19,215.90 and 7,277.58 is: 10,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.76 : 19,215.90 = 7,277.58 : x
  2. Step 2: Convert to fraction form
    12,821.76/19,215.90 = 7,277.58/x
  3. Step 3: Cross multiply
    12,821.76x = 19,215.90 × 7,277.58
  4. Step 4: Simplify right side
    12,821.76x = 139,845,249.52
  5. Step 5: Solve for x
    x = 139,845,249.52/12,821.76
  6. Step 6: Final answer
    x = 10,906.87

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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.