Home / 21,156.90-31,723.20-6,363.60

Finding the Fourth Proportional to 21,156.90, 31,723.20 and 6,363.60

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Solution

The fourth proportional to 21,156.90, 31,723.20 and 6,363.60 is: 9,541.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.90 : 31,723.20 = 6,363.60 : x
  2. Step 2: Convert to fraction form
    21,156.90/31,723.20 = 6,363.60/x
  3. Step 3: Cross multiply
    21,156.90x = 31,723.20 × 6,363.60
  4. Step 4: Simplify right side
    21,156.90x = 201,873,755.52
  5. Step 5: Solve for x
    x = 201,873,755.52/21,156.90
  6. Step 6: Final answer
    x = 9,541.75

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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.