Home / 28,701.15-43,010.83-21,145.28

Finding the Fourth Proportional to 28,701.15, 43,010.83 and 21,145.28

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Solution

The fourth proportional to 28,701.15, 43,010.83 and 21,145.28 is: 31,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,701.15 : 43,010.83 = 21,145.28 : x
  2. Step 2: Convert to fraction form
    28,701.15/43,010.83 = 21,145.28/x
  3. Step 3: Cross multiply
    28,701.15x = 43,010.83 × 21,145.28
  4. Step 4: Simplify right side
    28,701.15x = 909,476,043.38
  5. Step 5: Solve for x
    x = 909,476,043.38/28,701.15
  6. Step 6: Final answer
    x = 31,687.80

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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.