Home / 31,115.94-42,940.16-16,968.88

Finding the Fourth Proportional to 31,115.94, 42,940.16 and 16,968.88

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Solution

The fourth proportional to 31,115.94, 42,940.16 and 16,968.88 is: 23,417.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.94 : 42,940.16 = 16,968.88 : x
  2. Step 2: Convert to fraction form
    31,115.94/42,940.16 = 16,968.88/x
  3. Step 3: Cross multiply
    31,115.94x = 42,940.16 × 16,968.88
  4. Step 4: Simplify right side
    31,115.94x = 728,646,422.22
  5. Step 5: Solve for x
    x = 728,646,422.22/31,115.94
  6. Step 6: Final answer
    x = 23,417.14

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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.