Home / 20,874.69-28,812.51-12,912.27

Finding the Fourth Proportional to 20,874.69, 28,812.51 and 12,912.27

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Solution

The fourth proportional to 20,874.69, 28,812.51 and 12,912.27 is: 17,822.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.69 : 28,812.51 = 12,912.27 : x
  2. Step 2: Convert to fraction form
    20,874.69/28,812.51 = 12,912.27/x
  3. Step 3: Cross multiply
    20,874.69x = 28,812.51 × 12,912.27
  4. Step 4: Simplify right side
    20,874.69x = 372,034,908.50
  5. Step 5: Solve for x
    x = 372,034,908.50/20,874.69
  6. Step 6: Final answer
    x = 17,822.30

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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.