Home / 21,772.19-32,668.21-12,905.02

Finding the Fourth Proportional to 21,772.19, 32,668.21 and 12,905.02

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Solution

The fourth proportional to 21,772.19, 32,668.21 and 12,905.02 is: 19,363.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,772.19 : 32,668.21 = 12,905.02 : x
  2. Step 2: Convert to fraction form
    21,772.19/32,668.21 = 12,905.02/x
  3. Step 3: Cross multiply
    21,772.19x = 32,668.21 × 12,905.02
  4. Step 4: Simplify right side
    21,772.19x = 421,583,960.38
  5. Step 5: Solve for x
    x = 421,583,960.38/21,772.19
  6. Step 6: Final answer
    x = 19,363.41

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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.