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Finding the Fourth Proportional to 9,351.70, 12,905.13 and 5,159.86

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Solution

The fourth proportional to 9,351.70, 12,905.13 and 5,159.86 is: 7,120.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,351.70 : 12,905.13 = 5,159.86 : x
  2. Step 2: Convert to fraction form
    9,351.70/12,905.13 = 5,159.86/x
  3. Step 3: Cross multiply
    9,351.70x = 12,905.13 × 5,159.86
  4. Step 4: Simplify right side
    9,351.70x = 66,588,664.08
  5. Step 5: Solve for x
    x = 66,588,664.08/9,351.70
  6. Step 6: Final answer
    x = 7,120.49

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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.