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Finding the Fourth Proportional to 8,557.36, 11,811.36 and 5,580.64

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Solution

The fourth proportional to 8,557.36, 11,811.36 and 5,580.64 is: 7,702.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.36 : 11,811.36 = 5,580.64 : x
  2. Step 2: Convert to fraction form
    8,557.36/11,811.36 = 5,580.64/x
  3. Step 3: Cross multiply
    8,557.36x = 11,811.36 × 5,580.64
  4. Step 4: Simplify right side
    8,557.36x = 65,914,948.07
  5. Step 5: Solve for x
    x = 65,914,948.07/8,557.36
  6. Step 6: Final answer
    x = 7,702.72

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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.