Home / 15,787.39-21,786.45-8,713.66

Finding the Fourth Proportional to 15,787.39, 21,786.45 and 8,713.66

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Solution

The fourth proportional to 15,787.39, 21,786.45 and 8,713.66 is: 12,024.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.39 : 21,786.45 = 8,713.66 : x
  2. Step 2: Convert to fraction form
    15,787.39/21,786.45 = 8,713.66/x
  3. Step 3: Cross multiply
    15,787.39x = 21,786.45 × 8,713.66
  4. Step 4: Simplify right side
    15,787.39x = 189,839,717.91
  5. Step 5: Solve for x
    x = 189,839,717.91/15,787.39
  6. Step 6: Final answer
    x = 12,024.77

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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.