Home / 12,787.20-19,166.40-6,544.80

Finding the Fourth Proportional to 12,787.20, 19,166.40 and 6,544.80

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Solution

The fourth proportional to 12,787.20, 19,166.40 and 6,544.80 is: 9,809.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.20 : 19,166.40 = 6,544.80 : x
  2. Step 2: Convert to fraction form
    12,787.20/19,166.40 = 6,544.80/x
  3. Step 3: Cross multiply
    12,787.20x = 19,166.40 × 6,544.80
  4. Step 4: Simplify right side
    12,787.20x = 125,440,254.72
  5. Step 5: Solve for x
    x = 125,440,254.72/12,787.20
  6. Step 6: Final answer
    x = 9,809.83

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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.