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Finding the Fourth Proportional to 9,296.34, 12,809.88 and 8,640.06

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Solution

The fourth proportional to 9,296.34, 12,809.88 and 8,640.06 is: 11,905.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,296.34 : 12,809.88 = 8,640.06 : x
  2. Step 2: Convert to fraction form
    9,296.34/12,809.88 = 8,640.06/x
  3. Step 3: Cross multiply
    9,296.34x = 12,809.88 × 8,640.06
  4. Step 4: Simplify right side
    9,296.34x = 110,678,088.59
  5. Step 5: Solve for x
    x = 110,678,088.59/9,296.34
  6. Step 6: Final answer
    x = 11,905.56

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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.