Home / 31,012.80-42,797.12-16,865.57

Finding the Fourth Proportional to 31,012.80, 42,797.12 and 16,865.57

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Solution

The fourth proportional to 31,012.80, 42,797.12 and 16,865.57 is: 23,274.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,012.80 : 42,797.12 = 16,865.57 : x
  2. Step 2: Convert to fraction form
    31,012.80/42,797.12 = 16,865.57/x
  3. Step 3: Cross multiply
    31,012.80x = 42,797.12 × 16,865.57
  4. Step 4: Simplify right side
    31,012.80x = 721,797,524.84
  5. Step 5: Solve for x
    x = 721,797,524.84/31,012.80
  6. Step 6: Final answer
    x = 23,274.18

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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.