Home / 28,687.74-39,578.02-21,151.96

Finding the Fourth Proportional to 28,687.74, 39,578.02 and 21,151.96

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Solution

The fourth proportional to 28,687.74, 39,578.02 and 21,151.96 is: 29,181.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.74 : 39,578.02 = 21,151.96 : x
  2. Step 2: Convert to fraction form
    28,687.74/39,578.02 = 21,151.96/x
  3. Step 3: Cross multiply
    28,687.74x = 39,578.02 × 21,151.96
  4. Step 4: Simplify right side
    28,687.74x = 837,152,695.92
  5. Step 5: Solve for x
    x = 837,152,695.92/28,687.74
  6. Step 6: Final answer
    x = 29,181.55

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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.