Home / 31,321.10-43,239.78-21,303.02

Finding the Fourth Proportional to 31,321.10, 43,239.78 and 21,303.02

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Solution

The fourth proportional to 31,321.10, 43,239.78 and 21,303.02 is: 29,409.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,321.10 : 43,239.78 = 21,303.02 : x
  2. Step 2: Convert to fraction form
    31,321.10/43,239.78 = 21,303.02/x
  3. Step 3: Cross multiply
    31,321.10x = 43,239.78 × 21,303.02
  4. Step 4: Simplify right side
    31,321.10x = 921,137,898.14
  5. Step 5: Solve for x
    x = 921,137,898.14/31,321.10
  6. Step 6: Final answer
    x = 29,409.50

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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.