Home / 20,964.96-31,379.28-15,416.88

Finding the Fourth Proportional to 20,964.96, 31,379.28 and 15,416.88

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Solution

The fourth proportional to 20,964.96, 31,379.28 and 15,416.88 is: 23,075.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.96 : 31,379.28 = 15,416.88 : x
  2. Step 2: Convert to fraction form
    20,964.96/31,379.28 = 15,416.88/x
  3. Step 3: Cross multiply
    20,964.96x = 31,379.28 × 15,416.88
  4. Step 4: Simplify right side
    20,964.96x = 483,770,594.25
  5. Step 5: Solve for x
    x = 483,770,594.25/20,964.96
  6. Step 6: Final answer
    x = 23,075.20

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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.