Home / 20,331.60-28,056.60-11,379.12

Finding the Fourth Proportional to 20,331.60, 28,056.60 and 11,379.12

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Solution

The fourth proportional to 20,331.60, 28,056.60 and 11,379.12 is: 15,702.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.60 : 28,056.60 = 11,379.12 : x
  2. Step 2: Convert to fraction form
    20,331.60/28,056.60 = 11,379.12/x
  3. Step 3: Cross multiply
    20,331.60x = 28,056.60 × 11,379.12
  4. Step 4: Simplify right side
    20,331.60x = 319,259,418.19
  5. Step 5: Solve for x
    x = 319,259,418.19/20,331.60
  6. Step 6: Final answer
    x = 15,702.62

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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.