Home / 21,435.30-32,157.90-6,643.44

Finding the Fourth Proportional to 21,435.30, 32,157.90 and 6,643.44

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Solution

The fourth proportional to 21,435.30, 32,157.90 and 6,643.44 is: 9,966.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.30 : 32,157.90 = 6,643.44 : x
  2. Step 2: Convert to fraction form
    21,435.30/32,157.90 = 6,643.44/x
  3. Step 3: Cross multiply
    21,435.30x = 32,157.90 × 6,643.44
  4. Step 4: Simplify right side
    21,435.30x = 213,639,079.18
  5. Step 5: Solve for x
    x = 213,639,079.18/21,435.30
  6. Step 6: Final answer
    x = 9,966.69

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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.