Home / 12,787.28-19,166.28-5,380.64

Finding the Fourth Proportional to 12,787.28, 19,166.28 and 5,380.64

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Solution

The fourth proportional to 12,787.28, 19,166.28 and 5,380.64 is: 8,064.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.28 : 19,166.28 = 5,380.64 : x
  2. Step 2: Convert to fraction form
    12,787.28/19,166.28 = 5,380.64/x
  3. Step 3: Cross multiply
    12,787.28x = 19,166.28 × 5,380.64
  4. Step 4: Simplify right side
    12,787.28x = 103,126,852.82
  5. Step 5: Solve for x
    x = 103,126,852.82/12,787.28
  6. Step 6: Final answer
    x = 8,064.80

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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.