Home / 15,130.37-20,879.61-8,415.86

Finding the Fourth Proportional to 15,130.37, 20,879.61 and 8,415.86

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Solution

The fourth proportional to 15,130.37, 20,879.61 and 8,415.86 is: 11,613.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.37 : 20,879.61 = 8,415.86 : x
  2. Step 2: Convert to fraction form
    15,130.37/20,879.61 = 8,415.86/x
  3. Step 3: Cross multiply
    15,130.37x = 20,879.61 × 8,415.86
  4. Step 4: Simplify right side
    15,130.37x = 175,719,770.22
  5. Step 5: Solve for x
    x = 175,719,770.22/15,130.37
  6. Step 6: Final answer
    x = 11,613.71

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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.