Home / 8,631.64-11,915.72-5,647.60

Finding the Fourth Proportional to 8,631.64, 11,915.72 and 5,647.60

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Solution

The fourth proportional to 8,631.64, 11,915.72 and 5,647.60 is: 7,796.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.64 : 11,915.72 = 5,647.60 : x
  2. Step 2: Convert to fraction form
    8,631.64/11,915.72 = 5,647.60/x
  3. Step 3: Cross multiply
    8,631.64x = 11,915.72 × 5,647.60
  4. Step 4: Simplify right side
    8,631.64x = 67,295,220.27
  5. Step 5: Solve for x
    x = 67,295,220.27/8,631.64
  6. Step 6: Final answer
    x = 7,796.34

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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.