Home / 15,787.66-21,787.43-8,618.03

Finding the Fourth Proportional to 15,787.66, 21,787.43 and 8,618.03

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Solution

The fourth proportional to 15,787.66, 21,787.43 and 8,618.03 is: 11,893.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.66 : 21,787.43 = 8,618.03 : x
  2. Step 2: Convert to fraction form
    15,787.66/21,787.43 = 8,618.03/x
  3. Step 3: Cross multiply
    15,787.66x = 21,787.43 × 8,618.03
  4. Step 4: Simplify right side
    15,787.66x = 187,764,725.36
  5. Step 5: Solve for x
    x = 187,764,725.36/15,787.66
  6. Step 6: Final answer
    x = 11,893.13

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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.