Home / 31,905.01-47,879.42-11,128.51

Finding the Fourth Proportional to 31,905.01, 47,879.42 and 11,128.51

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Solution

The fourth proportional to 31,905.01, 47,879.42 and 11,128.51 is: 16,700.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,905.01 : 47,879.42 = 11,128.51 : x
  2. Step 2: Convert to fraction form
    31,905.01/47,879.42 = 11,128.51/x
  3. Step 3: Cross multiply
    31,905.01x = 47,879.42 × 11,128.51
  4. Step 4: Simplify right side
    31,905.01x = 532,826,548.62
  5. Step 5: Solve for x
    x = 532,826,548.62/31,905.01
  6. Step 6: Final answer
    x = 16,700.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.