Home / 20,500,128-28,287,720.72-11,331,524.16

Finding the Fourth Proportional to 20,500,128, 28,287,720.72 and 11,331,524.16

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Solution

The fourth proportional to 20,500,128, 28,287,720.72 and 11,331,524.16 is: 15,636,145.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500,128 : 28,287,720.72 = 11,331,524.16 : x
  2. Step 2: Convert to fraction form
    20,500,128/28,287,720.72 = 11,331,524.16/x
  3. Step 3: Cross multiply
    20,500,128x = 28,287,720.72 × 11,331,524.16
  4. Step 4: Simplify right side
    20,500,128x = 320,542,990,770,012.56
  5. Step 5: Solve for x
    x = 320,542,990,770,012.56/20,500,128
  6. Step 6: Final answer
    x = 15,636,145.82

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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.