Home / 31,718.40-43,770.72-18,289.60

Finding the Fourth Proportional to 31,718.40, 43,770.72 and 18,289.60

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Solution

The fourth proportional to 31,718.40, 43,770.72 and 18,289.60 is: 25,239.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,718.40 : 43,770.72 = 18,289.60 : x
  2. Step 2: Convert to fraction form
    31,718.40/43,770.72 = 18,289.60/x
  3. Step 3: Cross multiply
    31,718.40x = 43,770.72 × 18,289.60
  4. Step 4: Simplify right side
    31,718.40x = 800,548,960.51
  5. Step 5: Solve for x
    x = 800,548,960.51/31,718.40
  6. Step 6: Final answer
    x = 25,239.26

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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.