Home / 20,945.03-28,910.87-13,411.65

Finding the Fourth Proportional to 20,945.03, 28,910.87 and 13,411.65

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Solution

The fourth proportional to 20,945.03, 28,910.87 and 13,411.65 is: 18,512.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.03 : 28,910.87 = 13,411.65 : x
  2. Step 2: Convert to fraction form
    20,945.03/28,910.87 = 13,411.65/x
  3. Step 3: Cross multiply
    20,945.03x = 28,910.87 × 13,411.65
  4. Step 4: Simplify right side
    20,945.03x = 387,742,575.44
  5. Step 5: Solve for x
    x = 387,742,575.44/20,945.03
  6. Step 6: Final answer
    x = 18,512.39

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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.