Home / 15,787.32-21,786.31-8,713.59

Finding the Fourth Proportional to 15,787.32, 21,786.31 and 8,713.59

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Solution

The fourth proportional to 15,787.32, 21,786.31 and 8,713.59 is: 12,024.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.32 : 21,786.31 = 8,713.59 : x
  2. Step 2: Convert to fraction form
    15,787.32/21,786.31 = 8,713.59/x
  3. Step 3: Cross multiply
    15,787.32x = 21,786.31 × 8,713.59
  4. Step 4: Simplify right side
    15,787.32x = 189,836,972.95
  5. Step 5: Solve for x
    x = 189,836,972.95/15,787.32
  6. Step 6: Final answer
    x = 12,024.65

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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.