Home / 31,224.26-43,076.40-20,471.72

Finding the Fourth Proportional to 31,224.26, 43,076.40 and 20,471.72

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Solution

The fourth proportional to 31,224.26, 43,076.40 and 20,471.72 is: 28,242.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,224.26 : 43,076.40 = 20,471.72 : x
  2. Step 2: Convert to fraction form
    31,224.26/43,076.40 = 20,471.72/x
  3. Step 3: Cross multiply
    31,224.26x = 43,076.40 × 20,471.72
  4. Step 4: Simplify right side
    31,224.26x = 881,847,999.41
  5. Step 5: Solve for x
    x = 881,847,999.41/31,224.26
  6. Step 6: Final answer
    x = 28,242.40

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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.