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Finding the Fourth Proportional to 28,578.65, 42,895.62 and 13,797.95

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Solution

The fourth proportional to 28,578.65, 42,895.62 and 13,797.95 is: 20,710.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.65 : 42,895.62 = 13,797.95 : x
  2. Step 2: Convert to fraction form
    28,578.65/42,895.62 = 13,797.95/x
  3. Step 3: Cross multiply
    28,578.65x = 42,895.62 × 13,797.95
  4. Step 4: Simplify right side
    28,578.65x = 591,871,619.98
  5. Step 5: Solve for x
    x = 591,871,619.98/28,578.65
  6. Step 6: Final answer
    x = 20,710.27

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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.