Home / 13,899.93-20,857.88-13,787.09

Finding the Fourth Proportional to 13,899.93, 20,857.88 and 13,787.09

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Solution

The fourth proportional to 13,899.93, 20,857.88 and 13,787.09 is: 20,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,899.93 : 20,857.88 = 13,787.09 : x
  2. Step 2: Convert to fraction form
    13,899.93/20,857.88 = 13,787.09/x
  3. Step 3: Cross multiply
    13,899.93x = 20,857.88 × 13,787.09
  4. Step 4: Simplify right side
    13,899.93x = 287,569,379.73
  5. Step 5: Solve for x
    x = 287,569,379.73/13,899.93
  6. Step 6: Final answer
    x = 20,688.55

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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.