Home / 20,851.53-28,774.01-11,419.89

Finding the Fourth Proportional to 20,851.53, 28,774.01 and 11,419.89

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Solution

The fourth proportional to 20,851.53, 28,774.01 and 11,419.89 is: 15,758.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.53 : 28,774.01 = 11,419.89 : x
  2. Step 2: Convert to fraction form
    20,851.53/28,774.01 = 11,419.89/x
  3. Step 3: Cross multiply
    20,851.53x = 28,774.01 × 11,419.89
  4. Step 4: Simplify right side
    20,851.53x = 328,596,029.06
  5. Step 5: Solve for x
    x = 328,596,029.06/20,851.53
  6. Step 6: Final answer
    x = 15,758.84

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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.