Home / 31,688.60-43,731.30-18,258.80

Finding the Fourth Proportional to 31,688.60, 43,731.30 and 18,258.80

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Solution

The fourth proportional to 31,688.60, 43,731.30 and 18,258.80 is: 25,197.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,688.60 : 43,731.30 = 18,258.80 : x
  2. Step 2: Convert to fraction form
    31,688.60/43,731.30 = 18,258.80/x
  3. Step 3: Cross multiply
    31,688.60x = 43,731.30 × 18,258.80
  4. Step 4: Simplify right side
    31,688.60x = 798,481,060.44
  5. Step 5: Solve for x
    x = 798,481,060.44/31,688.60
  6. Step 6: Final answer
    x = 25,197.74

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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.