Home / 20,995.66-31,493.96-7,840.86

Finding the Fourth Proportional to 20,995.66, 31,493.96 and 7,840.86

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Solution

The fourth proportional to 20,995.66, 31,493.96 and 7,840.86 is: 11,761.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.66 : 31,493.96 = 7,840.86 : x
  2. Step 2: Convert to fraction form
    20,995.66/31,493.96 = 7,840.86/x
  3. Step 3: Cross multiply
    20,995.66x = 31,493.96 × 7,840.86
  4. Step 4: Simplify right side
    20,995.66x = 246,939,731.21
  5. Step 5: Solve for x
    x = 246,939,731.21/20,995.66
  6. Step 6: Final answer
    x = 11,761.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.