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Finding the Fourth Proportional to 20,998.72, 28,977.04 and 12,044.32

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Solution

The fourth proportional to 20,998.72, 28,977.04 and 12,044.32 is: 16,620.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.72 : 28,977.04 = 12,044.32 : x
  2. Step 2: Convert to fraction form
    20,998.72/28,977.04 = 12,044.32/x
  3. Step 3: Cross multiply
    20,998.72x = 28,977.04 × 12,044.32
  4. Step 4: Simplify right side
    20,998.72x = 349,008,742.41
  5. Step 5: Solve for x
    x = 349,008,742.41/20,998.72
  6. Step 6: Final answer
    x = 16,620.48

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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.