Home / 15,787.46-21,786.64-8,713.94

Finding the Fourth Proportional to 15,787.46, 21,786.64 and 8,713.94

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Solution

The fourth proportional to 15,787.46, 21,786.64 and 8,713.94 is: 12,025.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.46 : 21,786.64 = 8,713.94 : x
  2. Step 2: Convert to fraction form
    15,787.46/21,786.64 = 8,713.94/x
  3. Step 3: Cross multiply
    15,787.46x = 21,786.64 × 8,713.94
  4. Step 4: Simplify right side
    15,787.46x = 189,847,343.04
  5. Step 5: Solve for x
    x = 189,847,343.04/15,787.46
  6. Step 6: Final answer
    x = 12,025.20

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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.