Home / 28,262.16-39,003.12-15,687

Finding the Fourth Proportional to 28,262.16, 39,003.12 and 15,687

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Solution

The fourth proportional to 28,262.16, 39,003.12 and 15,687 is: 21,648.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,262.16 : 39,003.12 = 15,687 : x
  2. Step 2: Convert to fraction form
    28,262.16/39,003.12 = 15,687/x
  3. Step 3: Cross multiply
    28,262.16x = 39,003.12 × 15,687
  4. Step 4: Simplify right side
    28,262.16x = 611,841,943.44
  5. Step 5: Solve for x
    x = 611,841,943.44/28,262.16
  6. Step 6: Final answer
    x = 21,648.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.