Home / 20,469.36-28,247.76-12,086.40

Finding the Fourth Proportional to 20,469.36, 28,247.76 and 12,086.40

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Solution

The fourth proportional to 20,469.36, 28,247.76 and 12,086.40 is: 16,679.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,469.36 : 28,247.76 = 12,086.40 : x
  2. Step 2: Convert to fraction form
    20,469.36/28,247.76 = 12,086.40/x
  3. Step 3: Cross multiply
    20,469.36x = 28,247.76 × 12,086.40
  4. Step 4: Simplify right side
    20,469.36x = 341,413,726.46
  5. Step 5: Solve for x
    x = 341,413,726.46/20,469.36
  6. Step 6: Final answer
    x = 16,679.26

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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.