Home / 20,385.72-28,106.01-13,202.91

Finding the Fourth Proportional to 20,385.72, 28,106.01 and 13,202.91

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Solution

The fourth proportional to 20,385.72, 28,106.01 and 13,202.91 is: 18,202.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.72 : 28,106.01 = 13,202.91 : x
  2. Step 2: Convert to fraction form
    20,385.72/28,106.01 = 13,202.91/x
  3. Step 3: Cross multiply
    20,385.72x = 28,106.01 × 13,202.91
  4. Step 4: Simplify right side
    20,385.72x = 371,081,120.49
  5. Step 5: Solve for x
    x = 371,081,120.49/20,385.72
  6. Step 6: Final answer
    x = 18,202.99

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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.