Home / 31,000.32-42,789.60-18,433.44

Finding the Fourth Proportional to 31,000.32, 42,789.60 and 18,433.44

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Solution

The fourth proportional to 31,000.32, 42,789.60 and 18,433.44 is: 25,443.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,000.32 : 42,789.60 = 18,433.44 : x
  2. Step 2: Convert to fraction form
    31,000.32/42,789.60 = 18,433.44/x
  3. Step 3: Cross multiply
    31,000.32x = 42,789.60 × 18,433.44
  4. Step 4: Simplify right side
    31,000.32x = 788,759,524.22
  5. Step 5: Solve for x
    x = 788,759,524.22/31,000.32
  6. Step 6: Final answer
    x = 25,443.59

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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.