Home / 31,003.70-42,785.42-16,856.86

Finding the Fourth Proportional to 31,003.70, 42,785.42 and 16,856.86

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Solution

The fourth proportional to 31,003.70, 42,785.42 and 16,856.86 is: 23,262.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.70 : 42,785.42 = 16,856.86 : x
  2. Step 2: Convert to fraction form
    31,003.70/42,785.42 = 16,856.86/x
  3. Step 3: Cross multiply
    31,003.70x = 42,785.42 × 16,856.86
  4. Step 4: Simplify right side
    31,003.70x = 721,227,834.98
  5. Step 5: Solve for x
    x = 721,227,834.98/31,003.70
  6. Step 6: Final answer
    x = 23,262.64

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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.