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Finding the Fourth Proportional to 8,457.90, 11,670.90 and 4,921.74

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Solution

The fourth proportional to 8,457.90, 11,670.90 and 4,921.74 is: 6,791.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,457.90 : 11,670.90 = 4,921.74 : x
  2. Step 2: Convert to fraction form
    8,457.90/11,670.90 = 4,921.74/x
  3. Step 3: Cross multiply
    8,457.90x = 11,670.90 × 4,921.74
  4. Step 4: Simplify right side
    8,457.90x = 57,441,135.37
  5. Step 5: Solve for x
    x = 57,441,135.37/8,457.90
  6. Step 6: Final answer
    x = 6,791.42

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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.