Home / 20,513.10-28,324.90-12,971.64

Finding the Fourth Proportional to 20,513.10, 28,324.90 and 12,971.64

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Solution

The fourth proportional to 20,513.10, 28,324.90 and 12,971.64 is: 17,911.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.10 : 28,324.90 = 12,971.64 : x
  2. Step 2: Convert to fraction form
    20,513.10/28,324.90 = 12,971.64/x
  3. Step 3: Cross multiply
    20,513.10x = 28,324.90 × 12,971.64
  4. Step 4: Simplify right side
    20,513.10x = 367,420,405.84
  5. Step 5: Solve for x
    x = 367,420,405.84/20,513.10
  6. Step 6: Final answer
    x = 17,911.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.