Home / 20,129.76-27,778.56-11,176.98

Finding the Fourth Proportional to 20,129.76, 27,778.56 and 11,176.98

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Solution

The fourth proportional to 20,129.76, 27,778.56 and 11,176.98 is: 15,423.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.76 : 27,778.56 = 11,176.98 : x
  2. Step 2: Convert to fraction form
    20,129.76/27,778.56 = 11,176.98/x
  3. Step 3: Cross multiply
    20,129.76x = 27,778.56 × 11,176.98
  4. Step 4: Simplify right side
    20,129.76x = 310,480,409.55
  5. Step 5: Solve for x
    x = 310,480,409.55/20,129.76
  6. Step 6: Final answer
    x = 15,423.95

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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.