Home / 31,447.22-43,415.08-20,851.18

Finding the Fourth Proportional to 31,447.22, 43,415.08 and 20,851.18

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Solution

The fourth proportional to 31,447.22, 43,415.08 and 20,851.18 is: 28,786.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,447.22 : 43,415.08 = 20,851.18 : x
  2. Step 2: Convert to fraction form
    31,447.22/43,415.08 = 20,851.18/x
  3. Step 3: Cross multiply
    31,447.22x = 43,415.08 × 20,851.18
  4. Step 4: Simplify right side
    31,447.22x = 905,255,647.79
  5. Step 5: Solve for x
    x = 905,255,647.79/31,447.22
  6. Step 6: Final answer
    x = 28,786.51

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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.