Home / 31,108.30-42,917.20-19,150.86

Finding the Fourth Proportional to 31,108.30, 42,917.20 and 19,150.86

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Solution

The fourth proportional to 31,108.30, 42,917.20 and 19,150.86 is: 26,420.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.30 : 42,917.20 = 19,150.86 : x
  2. Step 2: Convert to fraction form
    31,108.30/42,917.20 = 19,150.86/x
  3. Step 3: Cross multiply
    31,108.30x = 42,917.20 × 19,150.86
  4. Step 4: Simplify right side
    31,108.30x = 821,901,288.79
  5. Step 5: Solve for x
    x = 821,901,288.79/31,108.30
  6. Step 6: Final answer
    x = 26,420.64

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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.