Home / 13,787.55-20,684.79-4,428.42

Finding the Fourth Proportional to 13,787.55, 20,684.79 and 4,428.42

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Solution

The fourth proportional to 13,787.55, 20,684.79 and 4,428.42 is: 6,643.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.55 : 20,684.79 = 4,428.42 : x
  2. Step 2: Convert to fraction form
    13,787.55/20,684.79 = 4,428.42/x
  3. Step 3: Cross multiply
    13,787.55x = 20,684.79 × 4,428.42
  4. Step 4: Simplify right side
    13,787.55x = 91,600,937.73
  5. Step 5: Solve for x
    x = 91,600,937.73/13,787.55
  6. Step 6: Final answer
    x = 6,643.74

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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.