Home / 31,086.55-42,899.40-16,939.39

Finding the Fourth Proportional to 31,086.55, 42,899.40 and 16,939.39

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Solution

The fourth proportional to 31,086.55, 42,899.40 and 16,939.39 is: 23,376.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,086.55 : 42,899.40 = 16,939.39 : x
  2. Step 2: Convert to fraction form
    31,086.55/42,899.40 = 16,939.39/x
  3. Step 3: Cross multiply
    31,086.55x = 42,899.40 × 16,939.39
  4. Step 4: Simplify right side
    31,086.55x = 726,689,452.87
  5. Step 5: Solve for x
    x = 726,689,452.87/31,086.55
  6. Step 6: Final answer
    x = 23,376.33

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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.