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Finding the Fourth Proportional to 9,181.60, 12,670.60 and 4,989.85

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Solution

The fourth proportional to 9,181.60, 12,670.60 and 4,989.85 is: 6,885.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,181.60 : 12,670.60 = 4,989.85 : x
  2. Step 2: Convert to fraction form
    9,181.60/12,670.60 = 4,989.85/x
  3. Step 3: Cross multiply
    9,181.60x = 12,670.60 × 4,989.85
  4. Step 4: Simplify right side
    9,181.60x = 63,224,349.26
  5. Step 5: Solve for x
    x = 63,224,349.26/9,181.60
  6. Step 6: Final answer
    x = 6,885.99

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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.