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Finding the Fourth Proportional to 8,957.40, 12,356.49 and 5,321.37

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Solution

The fourth proportional to 8,957.40, 12,356.49 and 5,321.37 is: 7,340.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.40 : 12,356.49 = 5,321.37 : x
  2. Step 2: Convert to fraction form
    8,957.40/12,356.49 = 5,321.37/x
  3. Step 3: Cross multiply
    8,957.40x = 12,356.49 × 5,321.37
  4. Step 4: Simplify right side
    8,957.40x = 65,753,455.19
  5. Step 5: Solve for x
    x = 65,753,455.19/8,957.40
  6. Step 6: Final answer
    x = 7,340.69

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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.