Home / 43,631.78-65,387.10-19,881.28

Finding the Fourth Proportional to 43,631.78, 65,387.10 and 19,881.28

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Solution

The fourth proportional to 43,631.78, 65,387.10 and 19,881.28 is: 29,794.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,631.78 : 65,387.10 = 19,881.28 : x
  2. Step 2: Convert to fraction form
    43,631.78/65,387.10 = 19,881.28/x
  3. Step 3: Cross multiply
    43,631.78x = 65,387.10 × 19,881.28
  4. Step 4: Simplify right side
    43,631.78x = 1,299,978,916.55
  5. Step 5: Solve for x
    x = 1,299,978,916.55/43,631.78
  6. Step 6: Final answer
    x = 29,794.32

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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.