Home / 20,755.02-31,132.53-5,172.66

Finding the Fourth Proportional to 20,755.02, 31,132.53 and 5,172.66

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Solution

The fourth proportional to 20,755.02, 31,132.53 and 5,172.66 is: 7,758.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.02 : 31,132.53 = 5,172.66 : x
  2. Step 2: Convert to fraction form
    20,755.02/31,132.53 = 5,172.66/x
  3. Step 3: Cross multiply
    20,755.02x = 31,132.53 × 5,172.66
  4. Step 4: Simplify right side
    20,755.02x = 161,037,992.63
  5. Step 5: Solve for x
    x = 161,037,992.63/20,755.02
  6. Step 6: Final answer
    x = 7,758.99

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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.