Home / 21,989.10-32,983.65-12,147.60

Finding the Fourth Proportional to 21,989.10, 32,983.65 and 12,147.60

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Solution

The fourth proportional to 21,989.10, 32,983.65 and 12,147.60 is: 18,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.10 : 32,983.65 = 12,147.60 : x
  2. Step 2: Convert to fraction form
    21,989.10/32,983.65 = 12,147.60/x
  3. Step 3: Cross multiply
    21,989.10x = 32,983.65 × 12,147.60
  4. Step 4: Simplify right side
    21,989.10x = 400,672,186.74
  5. Step 5: Solve for x
    x = 400,672,186.74/21,989.10
  6. Step 6: Final answer
    x = 18,221.40

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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.