Home / 20,438.40-30,651.84-8,764.32

Finding the Fourth Proportional to 20,438.40, 30,651.84 and 8,764.32

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Solution

The fourth proportional to 20,438.40, 30,651.84 and 8,764.32 is: 13,144.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.40 : 30,651.84 = 8,764.32 : x
  2. Step 2: Convert to fraction form
    20,438.40/30,651.84 = 8,764.32/x
  3. Step 3: Cross multiply
    20,438.40x = 30,651.84 × 8,764.32
  4. Step 4: Simplify right side
    20,438.40x = 268,642,534.35
  5. Step 5: Solve for x
    x = 268,642,534.35/20,438.40
  6. Step 6: Final answer
    x = 13,144.01

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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.