Home / 21,430.43-32,154.09-6,640.50

Finding the Fourth Proportional to 21,430.43, 32,154.09 and 6,640.50

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Solution

The fourth proportional to 21,430.43, 32,154.09 and 6,640.50 is: 9,963.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.43 : 32,154.09 = 6,640.50 : x
  2. Step 2: Convert to fraction form
    21,430.43/32,154.09 = 6,640.50/x
  3. Step 3: Cross multiply
    21,430.43x = 32,154.09 × 6,640.50
  4. Step 4: Simplify right side
    21,430.43x = 213,519,234.65
  5. Step 5: Solve for x
    x = 213,519,234.65/21,430.43
  6. Step 6: Final answer
    x = 9,963.37

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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.