Home / 13,787.42-19,025.09-8,121.80

Finding the Fourth Proportional to 13,787.42, 19,025.09 and 8,121.80

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Solution

The fourth proportional to 13,787.42, 19,025.09 and 8,121.80 is: 11,207.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.42 : 19,025.09 = 8,121.80 : x
  2. Step 2: Convert to fraction form
    13,787.42/19,025.09 = 8,121.80/x
  3. Step 3: Cross multiply
    13,787.42x = 19,025.09 × 8,121.80
  4. Step 4: Simplify right side
    13,787.42x = 154,518,059.06
  5. Step 5: Solve for x
    x = 154,518,059.06/13,787.42
  6. Step 6: Final answer
    x = 11,207.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.