Home / 31,720.24-43,770.81-18,108.46

Finding the Fourth Proportional to 31,720.24, 43,770.81 and 18,108.46

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Solution

The fourth proportional to 31,720.24, 43,770.81 and 18,108.46 is: 24,987.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.24 : 43,770.81 = 18,108.46 : x
  2. Step 2: Convert to fraction form
    31,720.24/43,770.81 = 18,108.46/x
  3. Step 3: Cross multiply
    31,720.24x = 43,770.81 × 18,108.46
  4. Step 4: Simplify right side
    31,720.24x = 792,621,962.05
  5. Step 5: Solve for x
    x = 792,621,962.05/31,720.24
  6. Step 6: Final answer
    x = 24,987.89

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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.