Home / 15,787.96-21,787.05-8,617.64

Finding the Fourth Proportional to 15,787.96, 21,787.05 and 8,617.64

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Solution

The fourth proportional to 15,787.96, 21,787.05 and 8,617.64 is: 11,892.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.96 : 21,787.05 = 8,617.64 : x
  2. Step 2: Convert to fraction form
    15,787.96/21,787.05 = 8,617.64/x
  3. Step 3: Cross multiply
    15,787.96x = 21,787.05 × 8,617.64
  4. Step 4: Simplify right side
    15,787.96x = 187,752,953.56
  5. Step 5: Solve for x
    x = 187,752,953.56/15,787.96
  6. Step 6: Final answer
    x = 11,892.16

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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.