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Finding the Fourth Proportional to 9,388.60, 12,945.60 and 6,406.18

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Solution

The fourth proportional to 9,388.60, 12,945.60 and 6,406.18 is: 8,833.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.60 : 12,945.60 = 6,406.18 : x
  2. Step 2: Convert to fraction form
    9,388.60/12,945.60 = 6,406.18/x
  3. Step 3: Cross multiply
    9,388.60x = 12,945.60 × 6,406.18
  4. Step 4: Simplify right side
    9,388.60x = 82,931,843.81
  5. Step 5: Solve for x
    x = 82,931,843.81/9,388.60
  6. Step 6: Final answer
    x = 8,833.25

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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.