Home / 10,921.40-16,379.39-4,680.70

Finding the Fourth Proportional to 10,921.40, 16,379.39 and 4,680.70

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Solution

The fourth proportional to 10,921.40, 16,379.39 and 4,680.70 is: 7,019.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.40 : 16,379.39 = 4,680.70 : x
  2. Step 2: Convert to fraction form
    10,921.40/16,379.39 = 4,680.70/x
  3. Step 3: Cross multiply
    10,921.40x = 16,379.39 × 4,680.70
  4. Step 4: Simplify right side
    10,921.40x = 76,666,987.37
  5. Step 5: Solve for x
    x = 76,666,987.37/10,921.40
  6. Step 6: Final answer
    x = 7,019.89

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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.