Home / 47,969.78-71,948.18-12,911.54

Finding the Fourth Proportional to 47,969.78, 71,948.18 and 12,911.54

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Solution

The fourth proportional to 47,969.78, 71,948.18 and 12,911.54 is: 19,365.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,969.78 : 71,948.18 = 12,911.54 : x
  2. Step 2: Convert to fraction form
    47,969.78/71,948.18 = 12,911.54/x
  3. Step 3: Cross multiply
    47,969.78x = 71,948.18 × 12,911.54
  4. Step 4: Simplify right side
    47,969.78x = 928,961,476.54
  5. Step 5: Solve for x
    x = 928,961,476.54/47,969.78
  6. Step 6: Final answer
    x = 19,365.56

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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.