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Finding the Fourth Proportional to 19,980.21, 29,962.51 and 7,493.43

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Solution

The fourth proportional to 19,980.21, 29,962.51 and 7,493.43 is: 11,237.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.21 : 29,962.51 = 7,493.43 : x
  2. Step 2: Convert to fraction form
    19,980.21/29,962.51 = 7,493.43/x
  3. Step 3: Cross multiply
    19,980.21x = 29,962.51 × 7,493.43
  4. Step 4: Simplify right side
    19,980.21x = 224,521,971.31
  5. Step 5: Solve for x
    x = 224,521,971.31/19,980.21
  6. Step 6: Final answer
    x = 11,237.22

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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.