Home / 13,787.75-20,685.09-4,428.60

Finding the Fourth Proportional to 13,787.75, 20,685.09 and 4,428.60

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Solution

The fourth proportional to 13,787.75, 20,685.09 and 4,428.60 is: 6,644.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.75 : 20,685.09 = 4,428.60 : x
  2. Step 2: Convert to fraction form
    13,787.75/20,685.09 = 4,428.60/x
  3. Step 3: Cross multiply
    13,787.75x = 20,685.09 × 4,428.60
  4. Step 4: Simplify right side
    13,787.75x = 91,605,989.57
  5. Step 5: Solve for x
    x = 91,605,989.57/13,787.75
  6. Step 6: Final answer
    x = 6,644.02

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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.