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Finding the Fourth Proportional to 9,351.64, 12,905.90 and 5,374.34

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Solution

The fourth proportional to 9,351.64, 12,905.90 and 5,374.34 is: 7,416.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,351.64 : 12,905.90 = 5,374.34 : x
  2. Step 2: Convert to fraction form
    9,351.64/12,905.90 = 5,374.34/x
  3. Step 3: Cross multiply
    9,351.64x = 12,905.90 × 5,374.34
  4. Step 4: Simplify right side
    9,351.64x = 69,360,694.61
  5. Step 5: Solve for x
    x = 69,360,694.61/9,351.64
  6. Step 6: Final answer
    x = 7,416.96

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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.