Home / 31,746.36-43,827.30-20,991.72

Finding the Fourth Proportional to 31,746.36, 43,827.30 and 20,991.72

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Solution

The fourth proportional to 31,746.36, 43,827.30 and 20,991.72 is: 28,980.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,746.36 : 43,827.30 = 20,991.72 : x
  2. Step 2: Convert to fraction form
    31,746.36/43,827.30 = 20,991.72/x
  3. Step 3: Cross multiply
    31,746.36x = 43,827.30 × 20,991.72
  4. Step 4: Simplify right side
    31,746.36x = 920,010,409.96
  5. Step 5: Solve for x
    x = 920,010,409.96/31,746.36
  6. Step 6: Final answer
    x = 28,980.03

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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.