Home / 31,120.14-42,945.38-16,972.68

Finding the Fourth Proportional to 31,120.14, 42,945.38 and 16,972.68

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Solution

The fourth proportional to 31,120.14, 42,945.38 and 16,972.68 is: 23,422.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,120.14 : 42,945.38 = 16,972.68 : x
  2. Step 2: Convert to fraction form
    31,120.14/42,945.38 = 16,972.68/x
  3. Step 3: Cross multiply
    31,120.14x = 42,945.38 × 16,972.68
  4. Step 4: Simplify right side
    31,120.14x = 728,898,192.22
  5. Step 5: Solve for x
    x = 728,898,192.22/31,120.14
  6. Step 6: Final answer
    x = 23,422.07

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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.