Home / 20,377.77-28,122.48-11,428.14

Finding the Fourth Proportional to 20,377.77, 28,122.48 and 11,428.14

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Solution

The fourth proportional to 20,377.77, 28,122.48 and 11,428.14 is: 15,771.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.77 : 28,122.48 = 11,428.14 : x
  2. Step 2: Convert to fraction form
    20,377.77/28,122.48 = 11,428.14/x
  3. Step 3: Cross multiply
    20,377.77x = 28,122.48 × 11,428.14
  4. Step 4: Simplify right side
    20,377.77x = 321,387,638.59
  5. Step 5: Solve for x
    x = 321,387,638.59/20,377.77
  6. Step 6: Final answer
    x = 15,771.48

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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.