Home / 20,977.76-28,949.40-12,025.78

Finding the Fourth Proportional to 20,977.76, 28,949.40 and 12,025.78

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Solution

The fourth proportional to 20,977.76, 28,949.40 and 12,025.78 is: 16,595.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.76 : 28,949.40 = 12,025.78 : x
  2. Step 2: Convert to fraction form
    20,977.76/28,949.40 = 12,025.78/x
  3. Step 3: Cross multiply
    20,977.76x = 28,949.40 × 12,025.78
  4. Step 4: Simplify right side
    20,977.76x = 348,139,115.53
  5. Step 5: Solve for x
    x = 348,139,115.53/20,977.76
  6. Step 6: Final answer
    x = 16,595.63

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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.