Home / 20,664.72-28,517.40-12,281.28

Finding the Fourth Proportional to 20,664.72, 28,517.40 and 12,281.28

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Solution

The fourth proportional to 20,664.72, 28,517.40 and 12,281.28 is: 16,948.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.72 : 28,517.40 = 12,281.28 : x
  2. Step 2: Convert to fraction form
    20,664.72/28,517.40 = 12,281.28/x
  3. Step 3: Cross multiply
    20,664.72x = 28,517.40 × 12,281.28
  4. Step 4: Simplify right side
    20,664.72x = 350,230,174.27
  5. Step 5: Solve for x
    x = 350,230,174.27/20,664.72
  6. Step 6: Final answer
    x = 16,948.22

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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.