Home / 15,787.29-21,786.13-8,617.35

Finding the Fourth Proportional to 15,787.29, 21,786.13 and 8,617.35

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Solution

The fourth proportional to 15,787.29, 21,786.13 and 8,617.35 is: 11,891.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.29 : 21,786.13 = 8,617.35 : x
  2. Step 2: Convert to fraction form
    15,787.29/21,786.13 = 8,617.35/x
  3. Step 3: Cross multiply
    15,787.29x = 21,786.13 × 8,617.35
  4. Step 4: Simplify right side
    15,787.29x = 187,738,598.42
  5. Step 5: Solve for x
    x = 187,738,598.42/15,787.29
  6. Step 6: Final answer
    x = 11,891.76

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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.