Home / 7,787.31-11,686.10-2,857.00

Finding the Fourth Proportional to 7,787.31, 11,686.10 and 2,857.00

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Solution

The fourth proportional to 7,787.31, 11,686.10 and 2,857.00 is: 4,287.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,787.31 : 11,686.10 = 2,857.00 : x
  2. Step 2: Convert to fraction form
    7,787.31/11,686.10 = 2,857.00/x
  3. Step 3: Cross multiply
    7,787.31x = 11,686.10 × 2,857.00
  4. Step 4: Simplify right side
    7,787.31x = 33,387,141.28
  5. Step 5: Solve for x
    x = 33,387,141.28/7,787.31
  6. Step 6: Final answer
    x = 4,287.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.