Home / 20,851.45-28,774.64-11,898.72

Finding the Fourth Proportional to 20,851.45, 28,774.64 and 11,898.72

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Solution

The fourth proportional to 20,851.45, 28,774.64 and 11,898.72 is: 16,420.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.45 : 28,774.64 = 11,898.72 : x
  2. Step 2: Convert to fraction form
    20,851.45/28,774.64 = 11,898.72/x
  3. Step 3: Cross multiply
    20,851.45x = 28,774.64 × 11,898.72
  4. Step 4: Simplify right side
    20,851.45x = 342,381,414.21
  5. Step 5: Solve for x
    x = 342,381,414.21/20,851.45
  6. Step 6: Final answer
    x = 16,420.03

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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.