Home / 31,144.81-42,980.14-16,997.66

Finding the Fourth Proportional to 31,144.81, 42,980.14 and 16,997.66

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Solution

The fourth proportional to 31,144.81, 42,980.14 and 16,997.66 is: 23,456.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,144.81 : 42,980.14 = 16,997.66 : x
  2. Step 2: Convert to fraction form
    31,144.81/42,980.14 = 16,997.66/x
  3. Step 3: Cross multiply
    31,144.81x = 42,980.14 × 16,997.66
  4. Step 4: Simplify right side
    31,144.81x = 730,561,506.58
  5. Step 5: Solve for x
    x = 730,561,506.58/31,144.81
  6. Step 6: Final answer
    x = 23,456.93

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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.