Home / 31,543.44-43,516.20-20,774.40

Finding the Fourth Proportional to 31,543.44, 43,516.20 and 20,774.40

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Solution

The fourth proportional to 31,543.44, 43,516.20 and 20,774.40 is: 28,659.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,543.44 : 43,516.20 = 20,774.40 : x
  2. Step 2: Convert to fraction form
    31,543.44/43,516.20 = 20,774.40/x
  3. Step 3: Cross multiply
    31,543.44x = 43,516.20 × 20,774.40
  4. Step 4: Simplify right side
    31,543.44x = 904,022,945.28
  5. Step 5: Solve for x
    x = 904,022,945.28/31,543.44
  6. Step 6: Final answer
    x = 28,659.62

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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.