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Finding the Fourth Proportional to 13,325.54, 18,391.64 and 7,948.31

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Solution

The fourth proportional to 13,325.54, 18,391.64 and 7,948.31 is: 10,970.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,325.54 : 18,391.64 = 7,948.31 : x
  2. Step 2: Convert to fraction form
    13,325.54/18,391.64 = 7,948.31/x
  3. Step 3: Cross multiply
    13,325.54x = 18,391.64 × 7,948.31
  4. Step 4: Simplify right side
    13,325.54x = 146,182,324.43
  5. Step 5: Solve for x
    x = 146,182,324.43/13,325.54
  6. Step 6: Final answer
    x = 10,970.09

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1.5x scale

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.