Home / 20,781.02-28,679.27-11,828.52

Finding the Fourth Proportional to 20,781.02, 28,679.27 and 11,828.52

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Solution

The fourth proportional to 20,781.02, 28,679.27 and 11,828.52 is: 16,324.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.02 : 28,679.27 = 11,828.52 : x
  2. Step 2: Convert to fraction form
    20,781.02/28,679.27 = 11,828.52/x
  3. Step 3: Cross multiply
    20,781.02x = 28,679.27 × 11,828.52
  4. Step 4: Simplify right side
    20,781.02x = 339,233,303.99
  5. Step 5: Solve for x
    x = 339,233,303.99/20,781.02
  6. Step 6: Final answer
    x = 16,324.19

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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.