Home / 21,200,581.54-29,274,987.06-20,515,022.65

Finding the Fourth Proportional to 21,200,581.54, 29,274,987.06 and 20,515,022.65

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Solution

The fourth proportional to 21,200,581.54, 29,274,987.06 and 20,515,022.65 is: 28,328,327.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,200,581.54 : 29,274,987.06 = 20,515,022.65 : x
  2. Step 2: Convert to fraction form
    21,200,581.54/29,274,987.06 = 20,515,022.65/x
  3. Step 3: Cross multiply
    21,200,581.54x = 29,274,987.06 × 20,515,022.65
  4. Step 4: Simplify right side
    21,200,581.54x = 600,577,022,614,356.88
  5. Step 5: Solve for x
    x = 600,577,022,614,356.88/21,200,581.54
  6. Step 6: Final answer
    x = 28,328,327.76

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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.