Home / 7,808.78-11,711.32-2,875.75

Finding the Fourth Proportional to 7,808.78, 11,711.32 and 2,875.75

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Solution

The fourth proportional to 7,808.78, 11,711.32 and 2,875.75 is: 4,312.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,808.78 : 11,711.32 = 2,875.75 : x
  2. Step 2: Convert to fraction form
    7,808.78/11,711.32 = 2,875.75/x
  3. Step 3: Cross multiply
    7,808.78x = 11,711.32 × 2,875.75
  4. Step 4: Simplify right side
    7,808.78x = 33,678,828.49
  5. Step 5: Solve for x
    x = 33,678,828.49/7,808.78
  6. Step 6: Final answer
    x = 4,312.94

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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.