Home / 21,128.87-31,698.11-11,262.95

Finding the Fourth Proportional to 21,128.87, 31,698.11 and 11,262.95

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Solution

The fourth proportional to 21,128.87, 31,698.11 and 11,262.95 is: 16,896.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.87 : 31,698.11 = 11,262.95 : x
  2. Step 2: Convert to fraction form
    21,128.87/31,698.11 = 11,262.95/x
  3. Step 3: Cross multiply
    21,128.87x = 31,698.11 × 11,262.95
  4. Step 4: Simplify right side
    21,128.87x = 357,014,228.02
  5. Step 5: Solve for x
    x = 357,014,228.02/21,128.87
  6. Step 6: Final answer
    x = 16,896.99

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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.