Home / 31,005.04-42,785.80-16,857.68

Finding the Fourth Proportional to 31,005.04, 42,785.80 and 16,857.68

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Solution

The fourth proportional to 31,005.04, 42,785.80 and 16,857.68 is: 23,262.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,005.04 : 42,785.80 = 16,857.68 : x
  2. Step 2: Convert to fraction form
    31,005.04/42,785.80 = 16,857.68/x
  3. Step 3: Cross multiply
    31,005.04x = 42,785.80 × 16,857.68
  4. Step 4: Simplify right side
    31,005.04x = 721,269,324.94
  5. Step 5: Solve for x
    x = 721,269,324.94/31,005.04
  6. Step 6: Final answer
    x = 23,262.97

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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.