Home / 31,720.85-43,769.21-18,102.68

Finding the Fourth Proportional to 31,720.85, 43,769.21 and 18,102.68

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Solution

The fourth proportional to 31,720.85, 43,769.21 and 18,102.68 is: 24,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.85 : 43,769.21 = 18,102.68 : x
  2. Step 2: Convert to fraction form
    31,720.85/43,769.21 = 18,102.68/x
  3. Step 3: Cross multiply
    31,720.85x = 43,769.21 × 18,102.68
  4. Step 4: Simplify right side
    31,720.85x = 792,339,693.12
  5. Step 5: Solve for x
    x = 792,339,693.12/31,720.85
  6. Step 6: Final answer
    x = 24,978.52

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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.