Home / 7,715.82-11,574.64-2,787.78

Finding the Fourth Proportional to 7,715.82, 11,574.64 and 2,787.78

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Solution

The fourth proportional to 7,715.82, 11,574.64 and 2,787.78 is: 4,182.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.82 : 11,574.64 = 2,787.78 : x
  2. Step 2: Convert to fraction form
    7,715.82/11,574.64 = 2,787.78/x
  3. Step 3: Cross multiply
    7,715.82x = 11,574.64 × 2,787.78
  4. Step 4: Simplify right side
    7,715.82x = 32,267,549.90
  5. Step 5: Solve for x
    x = 32,267,549.90/7,715.82
  6. Step 6: Final answer
    x = 4,182.00

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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.