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Finding the Fourth Proportional to 28,773.98, 39,718.89 and 21,280.62

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Solution

The fourth proportional to 28,773.98, 39,718.89 and 21,280.62 is: 29,375.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,773.98 : 39,718.89 = 21,280.62 : x
  2. Step 2: Convert to fraction form
    28,773.98/39,718.89 = 21,280.62/x
  3. Step 3: Cross multiply
    28,773.98x = 39,718.89 × 21,280.62
  4. Step 4: Simplify right side
    28,773.98x = 845,242,604.91
  5. Step 5: Solve for x
    x = 845,242,604.91/28,773.98
  6. Step 6: Final answer
    x = 29,375.24

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1.5x scale

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.