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Finding the Fourth Proportional to 12,391.54, 17,101.68 and 7,357.00

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Solution

The fourth proportional to 12,391.54, 17,101.68 and 7,357.00 is: 10,153.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.54 : 17,101.68 = 7,357.00 : x
  2. Step 2: Convert to fraction form
    12,391.54/17,101.68 = 7,357.00/x
  3. Step 3: Cross multiply
    12,391.54x = 17,101.68 × 7,357.00
  4. Step 4: Simplify right side
    12,391.54x = 125,816,989.42
  5. Step 5: Solve for x
    x = 125,816,989.42/12,391.54
  6. Step 6: Final answer
    x = 10,153.46

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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.