Home / 21,179.04-31,742.28-7,311.84

Finding the Fourth Proportional to 21,179.04, 31,742.28 and 7,311.84

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Solution

The fourth proportional to 21,179.04, 31,742.28 and 7,311.84 is: 10,958.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.04 : 31,742.28 = 7,311.84 : x
  2. Step 2: Convert to fraction form
    21,179.04/31,742.28 = 7,311.84/x
  3. Step 3: Cross multiply
    21,179.04x = 31,742.28 × 7,311.84
  4. Step 4: Simplify right side
    21,179.04x = 232,094,472.60
  5. Step 5: Solve for x
    x = 232,094,472.60/21,179.04
  6. Step 6: Final answer
    x = 10,958.69

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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.