Home / 31,317.75-43,218.63-18,742.50

Finding the Fourth Proportional to 31,317.75, 43,218.63 and 18,742.50

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Solution

The fourth proportional to 31,317.75, 43,218.63 and 18,742.50 is: 25,864.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,317.75 : 43,218.63 = 18,742.50 : x
  2. Step 2: Convert to fraction form
    31,317.75/43,218.63 = 18,742.50/x
  3. Step 3: Cross multiply
    31,317.75x = 43,218.63 × 18,742.50
  4. Step 4: Simplify right side
    31,317.75x = 810,025,172.78
  5. Step 5: Solve for x
    x = 810,025,172.78/31,317.75
  6. Step 6: Final answer
    x = 25,864.73

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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.