Home / 31,685.12-43,735.20-18,265.35

Finding the Fourth Proportional to 31,685.12, 43,735.20 and 18,265.35

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Solution

The fourth proportional to 31,685.12, 43,735.20 and 18,265.35 is: 25,211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,685.12 : 43,735.20 = 18,265.35 : x
  2. Step 2: Convert to fraction form
    31,685.12/43,735.20 = 18,265.35/x
  3. Step 3: Cross multiply
    31,685.12x = 43,735.20 × 18,265.35
  4. Step 4: Simplify right side
    31,685.12x = 798,838,735.32
  5. Step 5: Solve for x
    x = 798,838,735.32/31,685.12
  6. Step 6: Final answer
    x = 25,211.80

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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.