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Finding the Fourth Proportional to 6,887.59, 9,506.60 and 3,905.20

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Solution

The fourth proportional to 6,887.59, 9,506.60 and 3,905.20 is: 5,390.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,887.59 : 9,506.60 = 3,905.20 : x
  2. Step 2: Convert to fraction form
    6,887.59/9,506.60 = 3,905.20/x
  3. Step 3: Cross multiply
    6,887.59x = 9,506.60 × 3,905.20
  4. Step 4: Simplify right side
    6,887.59x = 37,125,181.32
  5. Step 5: Solve for x
    x = 37,125,181.32/6,887.59
  6. Step 6: Final answer
    x = 5,390.16

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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.