Home / 21,983.12-32,971.02-7,940.42

Finding the Fourth Proportional to 21,983.12, 32,971.02 and 7,940.42

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Solution

The fourth proportional to 21,983.12, 32,971.02 and 7,940.42 is: 11,909.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.12 : 32,971.02 = 7,940.42 : x
  2. Step 2: Convert to fraction form
    21,983.12/32,971.02 = 7,940.42/x
  3. Step 3: Cross multiply
    21,983.12x = 32,971.02 × 7,940.42
  4. Step 4: Simplify right side
    21,983.12x = 261,803,746.63
  5. Step 5: Solve for x
    x = 261,803,746.63/21,983.12
  6. Step 6: Final answer
    x = 11,909.31

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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.