Home / 31,115.80-42,939.72-16,968.65

Finding the Fourth Proportional to 31,115.80, 42,939.72 and 16,968.65

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Solution

The fourth proportional to 31,115.80, 42,939.72 and 16,968.65 is: 23,416.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.80 : 42,939.72 = 16,968.65 : x
  2. Step 2: Convert to fraction form
    31,115.80/42,939.72 = 16,968.65/x
  3. Step 3: Cross multiply
    31,115.80x = 42,939.72 × 16,968.65
  4. Step 4: Simplify right side
    31,115.80x = 728,628,865.08
  5. Step 5: Solve for x
    x = 728,628,865.08/31,115.80
  6. Step 6: Final answer
    x = 23,416.69

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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.