Home / 20,851.13-28,774.98-11,419.70

Finding the Fourth Proportional to 20,851.13, 28,774.98 and 11,419.70

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Solution

The fourth proportional to 20,851.13, 28,774.98 and 11,419.70 is: 15,759.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.13 : 28,774.98 = 11,419.70 : x
  2. Step 2: Convert to fraction form
    20,851.13/28,774.98 = 11,419.70/x
  3. Step 3: Cross multiply
    20,851.13x = 28,774.98 × 11,419.70
  4. Step 4: Simplify right side
    20,851.13x = 328,601,495.23
  5. Step 5: Solve for x
    x = 328,601,495.23/20,851.13
  6. Step 6: Final answer
    x = 15,759.41

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1.5x scale

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.