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Finding the Fourth Proportional to 13,855.48, 20,787.99 and 7,607.49

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Solution

The fourth proportional to 13,855.48, 20,787.99 and 7,607.49 is: 11,413.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.48 : 20,787.99 = 7,607.49 : x
  2. Step 2: Convert to fraction form
    13,855.48/20,787.99 = 7,607.49/x
  3. Step 3: Cross multiply
    13,855.48x = 20,787.99 × 7,607.49
  4. Step 4: Simplify right side
    13,855.48x = 158,144,426.05
  5. Step 5: Solve for x
    x = 158,144,426.05/13,855.48
  6. Step 6: Final answer
    x = 11,413.85

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1.5x scale

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.