Home / 10,870.78-16,311.30-5,329.30

Finding the Fourth Proportional to 10,870.78, 16,311.30 and 5,329.30

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Solution

The fourth proportional to 10,870.78, 16,311.30 and 5,329.30 is: 7,996.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,870.78 : 16,311.30 = 5,329.30 : x
  2. Step 2: Convert to fraction form
    10,870.78/16,311.30 = 5,329.30/x
  3. Step 3: Cross multiply
    10,870.78x = 16,311.30 × 5,329.30
  4. Step 4: Simplify right side
    10,870.78x = 86,927,811.09
  5. Step 5: Solve for x
    x = 86,927,811.09/10,870.78
  6. Step 6: Final answer
    x = 7,996.46

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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.