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Finding the Fourth Proportional to 9,351.76, 12,905.60 and 5,160.04

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Solution

The fourth proportional to 9,351.76, 12,905.60 and 5,160.04 is: 7,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,351.76 : 12,905.60 = 5,160.04 : x
  2. Step 2: Convert to fraction form
    9,351.76/12,905.60 = 5,160.04/x
  3. Step 3: Cross multiply
    9,351.76x = 12,905.60 × 5,160.04
  4. Step 4: Simplify right side
    9,351.76x = 66,593,412.22
  5. Step 5: Solve for x
    x = 66,593,412.22/9,351.76
  6. Step 6: Final answer
    x = 7,120.95

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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.