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Finding the Fourth Proportional to 8,584.40, 12,876.60 and 7,490.90

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Solution

The fourth proportional to 8,584.40, 12,876.60 and 7,490.90 is: 11,236.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,584.40 : 12,876.60 = 7,490.90 : x
  2. Step 2: Convert to fraction form
    8,584.40/12,876.60 = 7,490.90/x
  3. Step 3: Cross multiply
    8,584.40x = 12,876.60 × 7,490.90
  4. Step 4: Simplify right side
    8,584.40x = 96,457,322.94
  5. Step 5: Solve for x
    x = 96,457,322.94/8,584.40
  6. Step 6: Final answer
    x = 11,236.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.