Home / 28,262.96-39,002.72-15,687.68

Finding the Fourth Proportional to 28,262.96, 39,002.72 and 15,687.68

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Solution

The fourth proportional to 28,262.96, 39,002.72 and 15,687.68 is: 21,648.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,262.96 : 39,002.72 = 15,687.68 : x
  2. Step 2: Convert to fraction form
    28,262.96/39,002.72 = 15,687.68/x
  3. Step 3: Cross multiply
    28,262.96x = 39,002.72 × 15,687.68
  4. Step 4: Simplify right side
    28,262.96x = 611,862,190.49
  5. Step 5: Solve for x
    x = 611,862,190.49/28,262.96
  6. Step 6: Final answer
    x = 21,648.91

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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.