Home / 20,851.60-28,774.12-11,418.34

Finding the Fourth Proportional to 20,851.60, 28,774.12 and 11,418.34

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Solution

The fourth proportional to 20,851.60, 28,774.12 and 11,418.34 is: 15,756.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.60 : 28,774.12 = 11,418.34 : x
  2. Step 2: Convert to fraction form
    20,851.60/28,774.12 = 11,418.34/x
  3. Step 3: Cross multiply
    20,851.60x = 28,774.12 × 11,418.34
  4. Step 4: Simplify right side
    20,851.60x = 328,552,685.36
  5. Step 5: Solve for x
    x = 328,552,685.36/20,851.60
  6. Step 6: Final answer
    x = 15,756.71

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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.