Home / 21,719.50-29,972.94-12,287.86

Finding the Fourth Proportional to 21,719.50, 29,972.94 and 12,287.86

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Solution

The fourth proportional to 21,719.50, 29,972.94 and 12,287.86 is: 16,957.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.50 : 29,972.94 = 12,287.86 : x
  2. Step 2: Convert to fraction form
    21,719.50/29,972.94 = 12,287.86/x
  3. Step 3: Cross multiply
    21,719.50x = 29,972.94 × 12,287.86
  4. Step 4: Simplify right side
    21,719.50x = 368,303,290.51
  5. Step 5: Solve for x
    x = 368,303,290.51/21,719.50
  6. Step 6: Final answer
    x = 16,957.26

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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.