Home / 20,152.81-27,811.20-11,656.86

Finding the Fourth Proportional to 20,152.81, 27,811.20 and 11,656.86

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Solution

The fourth proportional to 20,152.81, 27,811.20 and 11,656.86 is: 16,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,152.81 : 27,811.20 = 11,656.86 : x
  2. Step 2: Convert to fraction form
    20,152.81/27,811.20 = 11,656.86/x
  3. Step 3: Cross multiply
    20,152.81x = 27,811.20 × 11,656.86
  4. Step 4: Simplify right side
    20,152.81x = 324,191,264.83
  5. Step 5: Solve for x
    x = 324,191,264.83/20,152.81
  6. Step 6: Final answer
    x = 16,086.65

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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.