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Finding the Fourth Proportional to 28,591.80, 42,913.80 and 14,561.52

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Solution

The fourth proportional to 28,591.80, 42,913.80 and 14,561.52 is: 21,855.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,591.80 : 42,913.80 = 14,561.52 : x
  2. Step 2: Convert to fraction form
    28,591.80/42,913.80 = 14,561.52/x
  3. Step 3: Cross multiply
    28,591.80x = 42,913.80 × 14,561.52
  4. Step 4: Simplify right side
    28,591.80x = 624,890,156.98
  5. Step 5: Solve for x
    x = 624,890,156.98/28,591.80
  6. Step 6: Final answer
    x = 21,855.57

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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.