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Finding the Fourth Proportional to 6,455.85, 8,907.69 and 4,221.01

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Solution

The fourth proportional to 6,455.85, 8,907.69 and 4,221.01 is: 5,824.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,455.85 : 8,907.69 = 4,221.01 : x
  2. Step 2: Convert to fraction form
    6,455.85/8,907.69 = 4,221.01/x
  3. Step 3: Cross multiply
    6,455.85x = 8,907.69 × 4,221.01
  4. Step 4: Simplify right side
    6,455.85x = 37,599,426.30
  5. Step 5: Solve for x
    x = 37,599,426.30/6,455.85
  6. Step 6: Final answer
    x = 5,824.09

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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.