Home / 20,781.02-31,185.20-7,633.51

Finding the Fourth Proportional to 20,781.02, 31,185.20 and 7,633.51

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Solution

The fourth proportional to 20,781.02, 31,185.20 and 7,633.51 is: 11,455.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.02 : 31,185.20 = 7,633.51 : x
  2. Step 2: Convert to fraction form
    20,781.02/31,185.20 = 7,633.51/x
  3. Step 3: Cross multiply
    20,781.02x = 31,185.20 × 7,633.51
  4. Step 4: Simplify right side
    20,781.02x = 238,052,536.05
  5. Step 5: Solve for x
    x = 238,052,536.05/20,781.02
  6. Step 6: Final answer
    x = 11,455.29

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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.