Home / 20,784.48-28,682.60-11,831.97

Finding the Fourth Proportional to 20,784.48, 28,682.60 and 11,831.97

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Solution

The fourth proportional to 20,784.48, 28,682.60 and 11,831.97 is: 16,328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.48 : 28,682.60 = 11,831.97 : x
  2. Step 2: Convert to fraction form
    20,784.48/28,682.60 = 11,831.97/x
  3. Step 3: Cross multiply
    20,784.48x = 28,682.60 × 11,831.97
  4. Step 4: Simplify right side
    20,784.48x = 339,371,692.30
  5. Step 5: Solve for x
    x = 339,371,692.30/20,784.48
  6. Step 6: Final answer
    x = 16,328.13

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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.