Home / 21,986.20-32,977.86-6,405.40

Finding the Fourth Proportional to 21,986.20, 32,977.86 and 6,405.40

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Solution

The fourth proportional to 21,986.20, 32,977.86 and 6,405.40 is: 9,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.20 : 32,977.86 = 6,405.40 : x
  2. Step 2: Convert to fraction form
    21,986.20/32,977.86 = 6,405.40/x
  3. Step 3: Cross multiply
    21,986.20x = 32,977.86 × 6,405.40
  4. Step 4: Simplify right side
    21,986.20x = 211,236,384.44
  5. Step 5: Solve for x
    x = 211,236,384.44/21,986.20
  6. Step 6: Final answer
    x = 9,607.68

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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.